TEHRAN, Jul 21 -Most of the science looking at gender differences among mammals have focused on physiological differences, but new research suggests many of those more outward-facing differences -- like height and facial hair -- are rooted in differences in the way males and females express their genes.
TEHRAN, Jul 21 -Unlike reptiles and birds, which scarf down large chunks of food or even swallow prey whole, most mammals chew before they swallow. The discovery of the 165-million-year-old remains of a shrew-like animal, Microdocodon gracilis, suggests some of the earliest ancestors of modern mammals chewed before they swallowed, too.
TEHRAN, May 15 - According to a new study, vertebrae numbers vary the most among mammals that spend much of their life hanging and swinging from tree limbs, like apes and sloths.