Direct fossil evidence for dinosaur skin color is unknown. Paleontologists think that some dinosaurs likely had protective coloration, such as pale undersides to reduce shadows, irregular color…
Dinosaurs went extinct about 65 million years ago (at the end of the Cretaceous Period), after living on Earth for about 165 million years. If all of Earth time from the very beginning of the…
No! After the dinosaurs died out, nearly 65 million years passed before people appeared on Earth. However, small mammals (including shrew-sized primates) were alive at the time of the dinosaurs.…
Paleontologists now have evidence that dinosaurs lived on all of the continents. At the beginning of the age of dinosaurs (during the Triassic Period, about 230 million years ago) the continents…
Dinosaur communities were separated by both time and geography. The “age of dinosaurs” (the Mesozoic Era) included three consecutive geologic time periods (the Triassic, Jurassic, and Cretaceous…
Why do leaves change color in the fall? One of the sure signs of fall (besides the beginning of a new school year) is the change in color of leaves from green to bright yellow, orange and red.…
PHYLUM: MOLLUSCASlugs, snails, oysters, clams, squid, octopuses, and cuttlefish are very different to look at, but they are all molluscs. They have a ribbon-like tongue, called the radula,…
(Encyclopedia) vivisectionvivisectionvĭvˌĭsĕkˈshən [key], dissection of living animals for experimental purposes. The use of the term in recent years has been expanded to include all experimentation…
Kentucky Derby (Churchill Downs, Louisville, Ky., May 5, 2007.) Purse: $2,000,000. Distance: 11/4 mi. Order of finish: 1. Street Sense (Borel), mutuel…
(Encyclopedia) cruelty, prevention of. In the 19th cent. many laws were passed in Great Britain and the United States to protect the helpless, especially children, lunatics, and domestic animals,…
