what is the largest animal to have ever existed

Hadrosaurids (Greek: ἁδρός, hadrós, “stout, thick”), or duck-billed dinosaurs, are members of the ornithischian family Hadrosauridae.
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Hadrosauridae.

Hadrosaurids Temporal range: Late Cretaceous,
Clade:	†Hadrosauromorpha
Family:	†Hadrosauridae Cope, 1869
Type species
† Hadrosaurus foulkii Leidy, 1858

How big was a real dire wolf?

Dire Wolves stood just over 2 feet tall (between 27 to 32 inches) and weighed on average 110 pounds. Scientists propose a maximum weight of 150 pounds (although some sources show from 125 to 175 lbs.).

What dinosaur did cats evolve from?

Cat evolution

All modern carnivorans, including cats, evolved from miacoids, which existed from approximately 66 to 33 million years ago.

Can dinosaurs come back?

The answer is YES. In fact they will return to the face of the earth in 2050. We found a pregnant T. rex fossil and had DNA in it this is rare and this helps scientists take a step closer of animal cloning a Tyrannosaurus rex and other dinosaurs.

What killed the Megalodon?

We know that megalodon had become extinct by the end of the Pliocene (2.6 million years ago), when the planet entered a phase of global cooling. … It may also have resulted in the megalodon’s prey either going extinct or adapting to the cooler waters and moving to where the sharks could not follow.