Demosponges, the first multicellular animals on earth, emerged 635 to 660 million years ago after a “Snowball Earth” period when the earth was almost completely frozen.
Some look like ancient oceans from 2.5 billion years ago.
It's an estimated 4 billion years old.
Megalolamna paradoxodon opens a new window into the age of giant sharks.
365 million years ago, this group of teen tetrapods was having a really bad time.
There might be Greenland sharks alive today that were born in Shakespeare's time.
Hydrothermal activity can create one hell of a lifelike structure.