Jordan Newquist Halloween has plenty of spooky elements. From ghosts to skeletons to killer clowns, there's something to scare everyone....

Sydney Prescott Many of us are familiar with Charles Darwin’s finches: each species' beak adapted to their unique island's food supplies....

By Conor Doolin Chromosomes are packages of genetic material. Females get two X chromosomes and males get both an X and a Y chromosome....