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Eons
Where Did Viruses Come From?
Season 1
Episode 45
There are fossils of viruses, of sorts, preserved in the DNA of the hosts that they’ve infected. Including you. This molecular fossil trail can help us understand where viruses came from, how they evolved and it can even help us tackle the biggest question of all: Are viruses alive?
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This is Lizards' Fascinating And Competitive History.

11:27
This small change in our appearance has helped shape the evolution of our entire lineage.

7:53
It arose from rhino ancestors, but Paraceratherium took a different evolutionary path.

8:48
Aegirocassis may have been the biggest animal in the Early Ordovician.

6:46
What is it about the crab’s form that makes it so evolutionarily successful?

7:52
We’ve only started to get to the bottom of how clubs worked and how it developed.

9:48
How and why does botanical carnivory keep evolving?

8:54
Our primate family tree actually originated here!

8:23
The horns probably had a purpose - one that rodents would likely benefit from today.

6:27
How did this giant marine reptile end up high in the Andes Mountains?

9:43
What if the rock art drawings of strange animals really existed?

8:48
How did Thrinaxodon and Broomistega become entombed together?