You’ve heard about salmon, whales, and sea turtles. Now learn what the clumsy-looking elephant seal accomplishes navigation-wise.
The spines of Australian echidnas and North American porcupines are remarkably similar.
A millimeter-sized beetle flies efficiently with feathery wings and a beat mode not seen before. Did it evolve by natural selection?
Examples of so-called “convergent” evolution are ubiquitous, including the camera eye design shared by the squid and human.
What do biologists make of the apparently purposive nature of all these different kinds of complex programmed behaviors?