After too many close calls, it was time to build a cage that could stand up to anything. From heavy-duty steel to reinforced locks, this critter cage is built like a fortress. Watch the full build ...

Low defense, zero limbs, no problem. TierZoo dissects how evolution’s strangest design choice became one of the world’s most ...

About 250 million years ago, as life was recovering from Earth’s greatest mass extinction, some reptiles began to change ...