A Brave new world: dinosaurs not quite wiped out (V2)

For all those who didn't follow my old TL, A brave new world is a TL that follows the rise of the Troodontidae and their decedents, a species of birdlike Therapod dinosaurs that, unlike, OTL, survive the K-Pg extinction event and continues to evolve into Paleogene and into modern day. In it, I tried to show a possible version of what a world with a surviving dinosaur species would have looked liked-and what species would have evolved. As it was, my original TL soon ran out of steam and, riddled with inaccuracies, errors (including grammatical) and a lack of direction (it had initially been a spur of the moment Tl anyway,) I had to call it a day.

Fortunately for those who were fans of the TL, its back, and this time armed with new information, new ideas (and a spellchecker:),) I am determined to finish it.

A few things first. Firstly, yes, this isn't in ASB like some of you want it to be on the grounds that A, the definition of ASB is "alternate history scenarios that involve time travel, magic, alien intervention, anything in the sea of time, and other such weirdness. Also alternate histories taking place in fictional universes (Star Wars, etc)"
My TL is not fantasy, and while it may be weird, it has nothing to do with star wars. So there.
Secondly, I may from time to time take some artistic liberties when it comes to the location of creatures (though not, obviously, creatures from completely different continents.)

Finally, I would also like to thank all those who commented-and nitpicked-my old TL. Without you guys, my TL would still be full of inaccuracies.

Oh, and enjoy!

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The Earths atmosphere,
above the continent of Laurentia,
66,038,000 BC (1)


In history, everything is shaped by cataclysmic events beyond the control of those who suffer from it. Sometimes the events are foretold years before, sometimes they are are mere accidents or caused by the fickle hand of chance. Sometimes they simply come out of the blue.
And sometimes, cataclysms and the events leading up to it are pre-ordained years, decades, thousands, if not millions of years before, and yet when it finally strikes, nobody or nothing is prepared for it.

Those creatures living more than 65 million years ago could have done nothing to stop, or even prepare for what was to happen even if they were intelligent enough to recognize the warning sighs. They were mere, playthings, pawns, collateral damage at the whim of events beyond both there control and there understanding. Just another layer of charred, broken layer of bones in a cliff face, the evidence of there life slowly swallowed by the relentless tides of time and decay, until all that is left is dust and imprints in the rock.
And yet sometimes, there are those who defy to whims of fate and survive.

And for them, the whole world is at their feet.
If only they can survive it.

The cataclysm in question came, not from earth, but from the heavans. It came in the form of a huge, jagged piece of space rock, worn down by seemingly endless millennia of collisions with other asteroids, yet still formidable, daunting. (2)
And dangerous.
It could be argued the fate of those Archosaurs and other large reptiles on earth was sealed in there infancy, over 150 million years before, when an Astroid in a far away belt on the other side of the solar system collided with another was was propelled on a fateful course.
It's course had sent it on a journey spanning millions of years hurtling through the bitterly cold, endless expanse of space, passing stars and planets, all of of a vast array of different shapes, sizes, colours, dying stars that were pulsated with energy desperatly bursting to be released, planets smothered in thick emerald green fog, planets made of blood red rock.
So beautiful, picaresque, dazzling and utterly lifeless. And the asteroid had flown past them harmlessly. But this planet it was hurtling towards was different.
It had life.
It had entire continents covered in thick, lush forests full of stinking primeval swamps .
Dry, scorching hot deserts where only the toughest survived, wide expanses of flat grassy plains that were inhabited of by a Manager y of monsters never seen before.

Huge, lumbering beasts we would have called " sauropods," with long windy necks that reached up through the thick canopy of trees into the blue skies above, Winged, grotesque flying demons that soared through the skies in there endless search for prey, smaller herd based creatures with strange crests with which they could create beautiful melodies that bathed the plains with a cacophony of sound and huge, terrifying, two legged tyrants, with hundreds of serrated, jagged teeth in a massive jaw capable of ripping its way through even the toughest bone or tendon. It had a vast body frame that put off even the bravest and most persistent rival, making it the master of all it surveyed through its cruel , piercing reptilian eyes.

All of them living in perfect harmony, in a never ending circle of life that had existed for more than 160 million years and seemed set to continue for another 160 million years.

There are those that argue that dinosaurs were already in decline at the end of the Cretaceous, with the number of species decreasing slowly as climate change and new plant life slowly scythed away at their population. Others argue they would have continued to flourish and evolve.
As it was, we will never know because a blinding flaming ball of flame tore through the sky and in that instant the entire world, with its perfect yet delicate circles were torn apart and plunged the world into fire, smoke, choking gas and then an endless winter.

And when the dust settled everything had changed. The vast forests were reduced to tinder wood, deserts turned to Arctic wildernesses, the great grasslands turned to a seemingly lifeless burial ground, covered in ash covered bones belonging to once to mighty monsters. All gone. For a whole decade sunlight was blocked out by a thick layer of ash and dust, preventing fresh plant life from sprouting forth, while lack of food soon caused the surviving carnivores to die of starvation. A few, remote groups of Maiasaura and Therapods struggled on for thousands of years, some making it into the Paleogene. But soon, disease and poisoning from new plan life and lack of food soon wiped out each group, 1 by 1, until it seemed the last of them were gone.
And then, in among st the wreckage of an old world, and the flaming crucible that marks the forming of a new one, the distant, birdlike caw in the early morning gloom marks the beginning of a new day. A new world.

For something has survived.

(1): This is based on radioactive decay of argon, and is accurate to within 100,000 years.
(2): new evidence released in a science journal recently suggests that it was a comet that struck during K-Pg event, although the asteroid is still the excepted theory. Other popular theories include flood Basalt's, sea regression, radiation or disease from new flowering plants.
 
Just another quick note.
The style of this TL will be similar to my last attempt-in the form of "walking with dinosaurs" style narration on the life of an individual or group of creatures-enabling you to both see how they lived and how they have adapted to survive. It will also be broken up by "fact boxes" that will give information on both certain aspects of the TL (like the evolution of plants) as well as the environmental or geological background to each era. Finally, there may be an occasional story from the point of view of the creatures themselves, often describing important events in there evolutionary story or flashbacks in the form of "campsite oral history."
Oh, and thanks for your enthusiasm so far! I promise their will be some major updates within the next few days!
 
Fact box 1: The evolution and classification of dinosaurs

Before we begin, its perhaps worth noting how dinosaurs are ordered and how they grew to dominance.

Compared to many areas of paleontology, charting the evolution and
classification of dinosaurs is surprisingly well known. Less well established is the actual origin of the clad Dinosauria (1) and when they developed.
What is mainly established and excepted is that all dinosaurs and other archosauria (including Birds and crocodilians ) evolved from early Archosaurs such as Proterosuchidae approximately 232-234 Ma, where upon the Archosaurs split into the two clades the Pseudosuchia ( which includes crocodiles and all there extinct relatives) and the Avemetatarsalia-which both birds and non-avian dinosaurs all belong to.

Whether or not you count Spondylosoma as the first dinosaur, it was one of the first of the order Saurischia ("lizard hipped") and arguably the prototype for most of the early dinosaurs: bipedal, only 1-2 meters long and carnivorous.

The first "confirmed" dinosaurs are all Saurischian and evolved roughly 243 Ma (16 million years earlier then previously thought) in the only recently described and confirmed species Nyasasaurus(2) , followed soon by Saturnalia (considered the ancestor and earliest sauropodomorph from which the sauropods originate,) Herrerasaurus (the earliest therapod to which Troodon belongs. )

However, the other order of ornithischian (bird hipped) didn't evolve until 220 Ma in Pisanosaurus -the first of the horned Ornithpodia,Neornithischia (Pachycephalosauria ) and finally Ceratopsia (think triceratops) and Lesothosaurus to which thyreophoran (stegosaurus) may have branched out from(3.)
Confusing the issue is that many of these creatures are not considered true dinosaurs, and are often grouped in different families as they don't fit in with the major families that evolved later.

The ordering of dinosauria is complicated, so i will have to simplify it. All dinosaurs are either ornithischians or Saurischians, with main difference between them being the configuration of their pelvis and in their skulls-Ornithischins having more solid skulls and stronger joints connecting the jaw to the lower jaw. This may be due to their herbivorous lifestyle.

http://en.wikipedia.org/wiki/File:Dino_evol_1_modificated_ES.svg

Saurischia are divided into Sauropodomorpha ( divided into prosaurapods sauropods) and Theropoda ( split into Ceratosauria, Basal Tetanurae, Tyrannosauroidea, Ornithomimosauria, Therizinosauroidea, Oviraptorosauria, Dromaeosauridae, Basal Avialae-bird ancestors and the family that concerns us, the Troodontidae.)

Ornithischia is divided into Thyreophorans (Stegosaurus,) Ornithopoda ( think Iguanadon) which are all descended from Agilosaurus and Marginocephalia- pachycephalosaurians and Ceratopsians.


http://en.wikipedia.org/wiki/File:Evolution_of_dinosaurs_EN.svg

Why were they so successful? For decades paleontologists assumed that dinosaurs had some special advantage over their rivals, that having two legs and (possibly) being endothermic gave them the ability to out compete their rivals. This, according to Steve Brusatte and Professor Mike Benton, is false.
Unlike today's crocodiles, Triassic crurotarsans (think crocodiles) were amazingly diverse. There were enormous quadrupedal predators, slender bipedal predators, swift bipedal omnivores, fish-eaters, root-grubbers, and low-to-mid-browsing herbivores. Many of these crurotarsans look nothing like crocodiles, but instead are eerily similar to dinosaurs and, in fact, have been mistaken for dinosaur ancestors, or even true dinosaurs, in the past. Such examples include Euparkaria and Postosuchus.

Crurotarsans and dinosaurs clearly shared many niches in the Late Triassic, looked very similar, and were thus very likely to be competing for similar resources . Evolutionary wise, crurotarsans were keeping pace with dinosauria. Also, crurotarsans were more abundant (more individuals, more fossils, more species) than dinosaurs in many Triassic ecosystems, and crurotarsans were in some cases more diverse (greater number of species). Putting all this together, it is very difficult to argue that dinosaurs were 'superior' to crurotarsans, or that they were out-competing crurotarsans.

If this is the case, then the dominance of the dinosaurs can be attributed to just a few factors: Luck, pluckiness, the destruction of much low lying plantlife and the fact that they were generally smaller meant that they needed less food to survive. It is this curious set of circumstances, that both propelled-and eventually pulled-the dinosaurs from dominance.
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(1): Dinosaurs can be defined as the last common ancestor of birds (Saurischia) and Triceratops (Ornithischia) and all the descendants of that ancestor. With that definition, the pterosaurs and several species of archosaurs narrowly miss out on being classified as dinosaurs. The pterosaurs are famous for flying through the Mesozoic skies on leathery wings and reaching the largest sizes of any flying animal. Archosaurs like Euparkaria and Postosuchus who were bipedal like early dinosaurs also narrowly miss out this definition.

(2): Because its body structure more closely matches that of the early dinosaurs than it does of dinosaur ancestors, it is suggested that Nyasasaurus was closer to the ancestry of dinosaurs than were other archosaurs at the time, while the elongated neck vertebrae with hollowed-out sides of the referred specimen provides two characters that are exclusive to the derived silesaurid Silesaurus (but absent in the earlier and more basal silesaurid Asilisaurus), and to early theropod dinosaurs. However, the timing of its evolution and certain differences has led scientists to conclude it may not be a true dinosaur but belong to the extended group of Dinosauriformes.

(3): Lesothosaurus has often been describes as a separate family not related to any other family, or a decedent of Neornithischia, which includes pachycephalosaurs, ceratopsians and ornithopods. Similar disputes over ancestry exists for all of these early dinosaurs, with Herrerasaurus being suggested to being a separate type of Archosaur entirely.
 
Oh, and one final thing, i'm afraid maps and pictures may be few and far between because....well i'm really bad at that kind of stuff. If anyone wants to help, PM me.

Oh, and if you have any criticisms, don't hold back! Any nitpicking and argument can only improve the TL.
 
It is possible, but so improbible that it ought to get ASBed

See my definition of ASB in the first post. It is possible.....and why is it extremely unlikely that a Troodon could have survived? we know they did anyway, lasting into the early Paleogene. If just a few more packs had survived......
 
sorry about all these background info, I promise they'll be shorter next time, and the real part of the TL will begin soon. Its just that i find that it adds depth and and sense of legitimacy to any TL.
 
Excellent.
Of course it can be argued / criticized to be 'Alternate Evolution' à la Dougal Dixon's 'The New Dinosaurs' rather than AH, not being rooted in (human) History.
But far more interesting than a zillionth thread about 'WI John Doe had won the US presidency'.
 
Chapter 1 part 1: Out from the ashes....

Sorry for the wait-I've been ill as of late. Hope you enjoy!
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"From the ashes a fire shall be woken, a light from the shadows shall spring; renenwed shall be blade that was broken, the crownless again shall be king.”​
- J.R.R Tolkien

Laramida, modern day Alaska
around 50 million BC


Our story begins with death of an old world and the slow rebirth of a new. When the fires of the impact had finally faded, 75% of all life on earth was gone, and virtually all the terrestrial, sky and aquatic Archosaurs were gone. In the extreme peripheries of the world small pockets, mainly Maiasaura or other small plant eaters struggled on on the small shoots able to grow but, whether due to lack of food, disease, interbreeding or lack of mates, or a combination of all of these, these pockets of life were extinguished.
All that is-except one.

http://en.eazel.com/results.php?cat=images&id=&oid=25&co=uk&lg=en&q=larmidia

Alaska in the late Cretaceous was a different world to the one we know today OTL. Despite the misconception that the poler regions were closer the the equator than today, in truth it was the high global temperatures that helped facilitate the vasts forests and swamps that then littered the area. In the summer the area was green, yet by winter the first tundras could just be seen peaking in the northern extremities.The animals who lived here tended to be migrational, or if they stayed, warm blooded and forced to adapt certain survival techniques not seen elsewhere. By the late Cretaceous, the landmass we now call North America was divided by a sea to form several different smaller landmasses. Laramida was the furthest north (1) and due to its isolated location was a completely different world to the one just a few hundred miles south. While the usual north american dinosaurs, including Maiasaura, triceratops and theropods were present, they were, in many ways, utterly alien to their cousins. The most unusual was the Alaskan Troodon(2).

Alaskan_Troodon


Unlike elsewhere, this Troodon subspecies was the apex predator of the north, with teeth 48% bigger than their cousins, and estimated to be twice their size, standing at nearly 5 meters long (huge by most theropods standards, when you consider that the feared Velociraptor was the size of a turkey.) On the first glance, being twice the size of your relatives in a colder, darker region with less food doesn't seem to make sense. Several theories have been suggested for this, but the main one seems to be that the increased body size was to accommodate larger eyes to help it see in the decreased light. It almost certainly had feathers, which helped it to cope in the cold, long nights of the winter.
Yet, perhaps the main difference from its relatives was that, because of the lack of competition and scarcity of low lying shrub life, the Alaskan Troodon was a pack hunter, preying on Maiasaura and living entirely on meat, living more like a Deinonychus instead of omnivore.

But how did this help this during the K-PG event? Pure Carnivores were, from the start, at a disadvantage due to their reliance on decreasing large herbivores. And yet, in a way, it was Troodon savior. While other large carnivores its southern cousins died off, niches were left, and instead of dying of troodon increased in size. Its feathers and experience of bitter Arctic winters certainly helped it against the Atomic winters that followed the impact, as did its eyes. But this is a secondary factor.

What really saved the species was meat. Meat for brain growth. Expanding the vital areas needed for communicating with pack members. Hunting strategies. It is no coincidence that the cleverest animals are predators, not just because meat contains protenes but because herbivores must devote themselves entirely;y to eating, since their diet is so vitamin and calorie weak that they only just make up what they lose by searching for food. Carnivores not only need to plan in order to eat, but high nutrient, high anmmino acid meat leaves predators more time for thinking, and less for eating. Meat is the heart of intelligence.

Not that these early troodon would understand what intelligence is. They are, of course, animals. Yet, it is this thinking, combined with their relative isolation that limits the spread of competition in the area, that ultimately saves species, and sets the stage for their revival.

Of course, its one thing to survive-but quite another to rule. And for these new troodontidae the battle has just begun.

(1): sorry, but sources on this "lost continent are rare: http://en.wikipedia.org/wiki/Laramidia

(2): This dinosaur is all OTL, with recently discovered teeth proving this:
http://alaskareport.com/news48/ned71128_dinosaur_teeth.htm
 
Note to self:
"Self, don't forget to unsubscribe from the old thread, and subscribe to this one."

I don't know how I missed this!
 
Hmm, in your last TL (V1) you said humanity wouldn't evolve, since the evolution of all species has been altered due to the existence of dinosaurs. That seemed very plausible. The dinosaurs would occupy some niches and compete with some animals that didn't had that much competition OTL, and even force some animals to occupy completely different niches than OTL. The butterflies would be enormous, and of course alter which animals survives the extinction events later on.

Also, technically mammals are Archosaurs too.
 
Hmm, in your last TL (V1) you said humanity wouldn't evolve, since the evolution of all species has been altered due to the existence of dinosaurs. That seemed very plausible. The dinosaurs would occupy some niches and compete with some animals that didn't had that much competition OTL, and even force some animals to occupy completely different niches than OTL. The butterflies would be enormous, and of course alter which animals survives the extinction events later on.

Also, technically mammals are Archosaurs too.

Don't worry-no humans will be popping up in this TL. Ever.
Also, you're not quite right about mammals being Archosaurs. Mammals are related from lineages of synapsids, a family of reptiles that were dominant during the Permian, and itself splintered from the Sauropsids, the group from which Archosaurs sprung from. They two groups split 320 million years ago, so really mammals are only really, really, really distant cousins to birds and other surviving Archosaurs.
 
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