You definitely know the story: toward the finish of the Cretaceous time frame, quite a while back, a comet or meteor struck the Yucatan landmass in Mexico, setting off outrageous changes in the worldwide environment that brought about what we call the K/T Extinction. Inside a brief timeframe — gauges range from a couple hundred to two or three thousand years — each and every dinosaur, pterosaur, and marine reptile had vanished off the essence of the earth, yet crocodiles, strangely, made due into the following Cenozoic Era.
For what reason should this be amazing? Indeed, the truth of the matter is that dinosaurs, pterosaurs, and crocodiles are totally slid from archosaurs, the "administering reptiles" of the late Permian and early Triassic periods. It's straightforward why the earliest warm-blooded animals endure the Yucatan influence; they were little, tree-staying animals that didn't need a lot of in that frame of mind of food and were protected by their fur against plunging temperatures. The equivalent goes for birds (just substitute "feathers" for fur). Yet, a few Cretaceous crocodiles, such as Deinosuchus, developed to good, even dinosaur-like sizes, and their ways of life weren't exactly quite the same as those of their dinosaur, pterosaur, or marine reptile cousins. So how did crocodiles figure out how to make due into the Cenozoic Era?
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Hypothesis #1: Crocodiles Were Exceptionally Well-Adapted

Though dinosaurs came in all shapes and sizes — tremendous, elephant-legged sauropods, minuscule, padded dino-birds, transcending, greedy tyrannosaurs — crocodiles have stayed with essentially a similar body plan for the last 200 million years (except for the absolute first Triassic crocodiles, as Erpotosuchus, which were bipedal and lived solely ashore). Maybe the squat legs and low-threw stance of crocodiles permitted them to in a real sense "hold their heads down" during the K/T disturbance, flourish in a wide assortment of climatic circumstances, and keep away from the destiny of their dinosaur buddies.
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Hypothesis #2: Crocodiles Lived Near The Water

As expressed over, the K/T Extinction cleared out land-staying dinosaurs and pterosaurs, as well as ocean-abiding mosasaurs (the smooth, horrendous marine reptiles that populated the world's seas around the finish of the Cretaceous time frame). Crocodiles, on the other hand, sought after a more land and/or water-capable way of life and roosted somewhere between dry land and long, winding freshwater streams and saltwater estuaries. Out of the blue, the Yucatan meteor influenced and affected freshwater streams and lakes more than it did saltwater seas, hence saving the crocodile genealogy.

Hypothesis #3: Crocodiles Are Cold-Blooded

Most scientists accept that theropod dinosaurs were warm-blooded and in this manner needed to continually eat to fuel their digestion systems — while the sheer mass of sauropods and hadrosaurs made them delayed to both retain and emanate intensity, and consequently ready to keep a consistent temperature. Neither of these transformations would have been exceptionally powerful if exposed, to dull circumstances promptly following the Yucatan meteor influence. Crocodiles, paradoxically, have traditionally "reptilian" unfeeling digestion systems, meaning they don't need to eat definitely and can make due for broadened periods of extreme dimness and cold.

Hypothesis #4: Crocodiles Grew More Slowly Than Dinosaurs

This is firmly connected with hypothesis #3, above. There's a rising measure of proof that dinosaurs of different types (counting theropods, sauropods, and hadrosaurs) encountered a speedy "development spray" from the get-go in their life cycles, a variation that better empowered them to stay away from predation. Crocodiles, on the other hand, develop consistently and gradually all through their lives and would have better had the option to adjust to the unexpected shortage of food after the K/T influence. (Envision a teenaged Tyrannosaurus Rex encountering a development spray out of nowhere expecting to eat fivefold the amount of meat as in the past, and not having the option to track down it!)

Hypothesis #5: Crocodiles Were Smarter Than Dinosaurs

This is likely the most dubious speculation on this rundown. Certain individuals who work with crocodiles swear that they're nearly essentially as savvy as felines or canines; besides the fact that they perceive can their proprietors and mentors, however, they can likewise become familiar with a restricted exhibit of "stunts" (like not gnawing their human coach into equal parts). Crocodiles and gators are likewise genuinely simple to tame, which might have permitted them to adjust all the more promptly to the brutal circumstances after the K/T influence. The issue with this hypothesis is that some end-Cretaceous dinosaurs (like Velociraptor) were additionally genuinely shrewd, and look what has been going on with them!
Indeed, even today, when the various warm-blooded animal, reptile, and bird species have become wiped out or are truly jeopardized, gators and crocodiles all over the planet keep on flourishing (with the exception of those designated by shoe-calfskin producers). Who knows — on the off chance that things continue to go the manner in which they have been, the prevailing types of life a long time from now might be cockroaches and caimans!

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