Elephants don't diet, as far as we know. But their weight does fluctuate, at least for the ones who live in a zoo. Now, researchers have found that this gain and loss in an elephant's mass appears to hinge on their jaws - more specifically, the unusual way these animals replace their teeth. The results appear in the journal Mammalian Biology.
Every new parent knows, or learns pretty quickly, that rocking can calm that fussy baby when it's time to take a nap. But the benefits of gentle motion may extend past the swaddling stage. Because two new studies show that rocking also helps grown-ups, both human and mouse, get a good night's sleep. The two research efforts are in the journal Current Biology.