Next Broadcast:

Ancient Shark Discovery
Sharks are commonly thought to be ancient creatures that haven't changed much in the past several hundred million years. But a new fossil of 350 million-year-old shark gills shows that sharks have been honing their deadly trade for millennia. It's clear that evolution can make a deadly fish even deadlier.

Wed, Apr 16, 2014 -- 11:00pm

Recently on All Things Considered:

Become a KQED sponsor