Killer whales are hunters. They have three-inch-long teeth and can swim at 30 miles per hour. Read all about these fascinating animals that continue to captivate children and adults alike.
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...