Some sharks can bite 300 times harder than a person and can hear prey in the water from 3,000 feet away. Find out more about these impressive hunters, from the tiny pygmy shark to the giant whale shark.
The same fascinating content thoughtfully translated for use in the classroom or at home.
One of the few unquestioned greats of twentieth-century science, Linus Pauling was the only person to receive two unshared Nobel Prizes-one in chemistry, for deciphering the quantum physics of large molecules, and one in peace, for helping to end nuclear bomb testing. His brilliance...