Snakes may be best known for slithering. But consider that these animals also perform one of the most extreme feats of posture control found in nature: They can stand nearly straight upright on a ...

While in the upright position, the sun bear at the Tha Lat Open Zoo in Nakhon Si Thammarat, Thailand, appears to wave and nod at guests A video showing a Malayan sun bear standing upright in a Thai ...