 On a hot day in the Australian outback, a koala hugs the cool branches of a eucalypt, while a wombat hides underground in its burrow, and a kangaroo spits on its wrists to chill its blood vessels. Nearer the coast, a fur seal on the rocks pees on its flippers. The echidna is different. It ... Echidnas Blow Bubbles of Snot to Stay Cool in The Australian... 