Tapeworms don't evoke warm thoughts in most people, but if you happen to take a close look at them, you'll realize they're ...

It doesn’t matter what the organisms look like — as long as you have self-replication and ecological competition, we expect this pattern to form. Layered structures can be generated by many processes, ...

Organisms have only two types of traits ... that the bones inside the dolphin's front flippers look a lot like wolf leg bones. Dolphins and wolves share this derived trait (and many others ...