Almost every popular depiction of a turtle gets this wrong in the same way, treating the shell as a portable house. The reality is stranger, because building a box out…
One foot, one shell it cannot leave, and thousands of teeth. Here are fifteen.
1. It Moves by Sending a Wave Along One Foot
Bands of muscle contract in sequence…
There is an image that makes most people wince the first time they see it: a hammer driving nails into a horse's foot.
The reaction is reasonable, and it rests…
There is a question about animal communication that has been argued for a long time, and alarm calls are where the evidence is strongest.
The question is whether animal signals…
There is a satisfying category of question where something entirely familiar turns out to be unexplained, and purring belongs in it.
The sound is known to essentially everybody. It is…
There is a category of behaviour that everybody recognises immediately and nobody can define precisely, which is usually a sign that something interesting is going on.
Play is obvious when…