George Washington died in 1799, the first Dinosaur fossil was discovered in 1824. George Washington never knew Dinosaurs existed.

Ferdinand Vandiveer Hayden

Based upon those drawings, modern scientists believe it was probably from a dinosaur known as “Megalosaurus.” Megalosaurus is believed to be the first dinosaur ever described scientifically. British fossil hunter William Buckland found some fossils in 1819, and he eventually described them and named them in 1824.

In May 1871, Marsh uncovered the first pterosaur fossils found in America. He also found early horses, flying reptiles, Cretaceous and Jurassic dinosaurs such as Triceratops, Stegosaurus, Brontosaurus, Apatosaurus and Allosaurus, and described the toothed birds of the Cretaceous Ichthyornis and Hesperornis.

George Washington died in 1799. So he never knew dinosaurs existed. Instead, he was more likely to have believed that there was an extinct race of giant humans.

about 65 million years ago

The average blue whale heart weighs 180 kg and is the largest known in any animal. Dreadnoughtus weighed more than seven T. rex but a blue whale weighs the same as 30 T. rex.

The ice age happened after the dinosaurs. The dinosaurs died out prior to the Pleistocene age, which was the last of five ice ages that spanned…

Dinosaurs did indeed rule Earth for millions of years. But they weren’t the first to do so! There were animals that roamed the world long before they did. In fact, life existed for hundreds of millions of years before the dinosaurs.

The last of the non-avian dinosaurs died out over 63 million years before the Pleistocene, the time during which the regular stars of the Ice Age films (mammoths, giant sloths, and sabercats) lived. …

A very severe ice age could have altered climates and froze waters to the extent that dinosaurs were unable to weather the conditions, and slowly died out. This theory has been largely discarded for one simple reason: scientists have not found any evidence of an ice age occurring during the life of the dinosaurs.

Long Before Dinosaurs, a Giant Asteroid Crash Caused an Ancient Ice Age. About 466 million years ago, long before the age of the dinosaurs, the Earth froze. The seas began to ice over at the Earth’s poles, and the new range of temperatures around the planet set the stage for a boom of new species evolving.

Humans inhabited North America in the depths of the last Ice Age, but didn’t thrive until the climate warmed.

Four theories have been advanced as likely causes of these extinctions: hunting by the spreading humans (or overkill hypothesis, initially developed by geoscientist Paul S. Martin), the change in climate at the end of the last glacial period, disease, and an impact from an asteroid or comet.

New University of Melbourne research has revealed that ice ages over the last million years ended when the tilt angle of the Earth’s axis was approaching higher values.

Other than birds, however, there is no scientific evidence that any dinosaurs, such as Tyrannosaurus, Velociraptor, Apatosaurus, Stegosaurus, or Triceratops, are still alive. These, and all other non-avian dinosaurs became extinct at least 65 million years ago at the end of the Cretaceous Period.

Oddly enough, an Ice Age has gripped the Earth for most of the last 2.6 million years, and we’re currently experiencing an unusually warm break from this so-called Quaternary glaciation, which temporarily lifted around 12,000 years ago. By itself, this will delay the next Ice Age by at least 50,000 years.

The Most Dangerous Extinct Animals

• Megalodon. A prehistoric Shark that was identical to the modern Great White except that it was possibly 60 feet long (over twice the size of a modern Orca) and close to 65 short tons in weight.
• Haast’s Eagle.
• Andrewsarchus.
• Titanoboa.
• Spinosaurus.
• Predator X.
• Terror Birds.
• Gigantopithicus.

Top 11 Scariest Prehistoric Animals

• Smilodon.
• Livyatan melvillei.
• Spinosaurus.
• Sarcosuchus.
• Titanoboa.
• Giganotosaurus.
• Megalodon. This 59 foot long shark lived and hunted in the same waters as Livyatan melvillei.
• Jaekelopterus. Three words, Giant Sea Scorpion.

With their penchant for hunting, habitat destruction and the release of invasive species, humans undid millions of years of evolution, and swiftly removed this bird from the face of the Earth. Since then, the dodo has nestled itself in our conscience as the first prominent example of human-driven extinction.