Around 70 million years ago.

probably small to medium sized dinosaurs like the dromeosaurid utahraptor. citipati and avimimus, maybe small species of allosaurus, small tyrannosaurids like raptorex, dilong, guanlong and alectrosaurus. some species of ornithomimidae. maybe small ceratopsidae like koreaceratops, yinlong and hualianceratops. herrerasaurus and ceolophysis also may have jumped

Ha haha. I can't list them all! Tell you what: I'll name 10 carnivores, 10 herbivores, and 1 omnivore(eats both meat and plants).Ready? Carnivores: Spinosaurus, Tyrannosaurus rex, velociraptor, gigantosaurus, ceratosaurus, Megalosaurus, Irritator, Troodon, Allosaurus and compsognathus. Herbivores: Triceratops, Brachiosaurus, Stegosaurus, Apatosaurus, Ankylosaurus, Minmi, Protoceratops, Monoclonius, Diplodocus, and Torosaurus. Omnivore: Avimimus. dino-b, the dinosaur loving expert

Keratin is the "fibrous structural protein" that makes up human hair. Reptile scales are also made of keratin. Regarding hairs specifically, geckos have keratin hairs on their toes. These hairs along with certain Phospholipids enable them to stick to practically everything.

Okay here are some Dinosaurs with names that start with the letter a. List: Ankylosaurus, Acanthopholis, Acrocanthosaurus, Albertosaurus, Allosaurus, Abelisaurus, Achelousaurus, Actiosaurus, Adasaurus, Aegyptosaurus, Aeolosaurus, Aepisaurus, Afrovenator, Agathaumas, Agilisaurus, Agrosaurus, Alamosaurus, Alectrosaurus, Alioramus, Algosaurus, Aliwalia, Alocodon, Altirhinus, Altispinax, Alvarezsaurus, Apatosaurus, Alwalkeria, Alxasaurus, Amargasaurus, Ammosaurus, Ampelosaurus, Amphicoelias, Amtosaurus, Amphisaurus, Amygdalodon, Amurosaurus, Anchisaurus, Anatosaurus, Anatotitan, Anchisauripus, Anchiceratops, Andesaurus, Angaturama, Anodontosaurus, Anomoepus, Anoplosaurus, Anserimimus, Antarctosaurus, Apatodon, Aragosaurus, Aralosaurus, Araucanoraptor, Archaeoceratops, Archaeoraptor, Archaeornithoides, Archaeornithomimus, Archillobator, Argentinosaurus, Arctosaurus, Arkansaurus, Argyrosaurus, Arrhinoceratops, Arstanosaurus, Asiaceratops, Asiatosaurus, Atlascoposaurus, Atlantosaurus, Astrodon, Atreipus, Aublysodon, Austrosaurus, Avaceratops, Avimimus, Avipes, and Azendosaurus.