ISAAC NEWTON, about 300 years ago, theorized how gravity works. He imagined a man throwing an object from the top of an unusually high mountain. If simply dropped, the object would fall, as would an apple, downward to the ground. If, however, it was thrown... 

AT THE sight of the ice cream, Luke’s eyes shine. As he reaches out to grasp the cone verbally offered to him, his mouth waters. He raises the delicacy to his mouth, smelling its sweetness as he does. Then, he tastes the delicious flavor with the first... 

Ah-choo! That sound, combined with watery, itchy eyes and a drippy, irritated nose, heralds the arrival of spring for millions of people. Their allergy usually results from an atmosphere laden with pollen. The BMJ (formerly British Medical Journal) estimates... 

Kangaroo Rat is general name given to a group of about 22 species of small North American rodents. There are several differences in the many species of this rodent, however they all prefer arid to semi-arid habitat. They will live in any dry region of... 

WHEN about to complete their conquest of Mount Everest in the summer of 1953, Sir Edmund Hillary and Tenzing Norgay were astonished to see a large bird flying at 27,000 feet (8,200 meters). Their report of this created considerable interest among ornithologists... 

WESTONBIRT, a village in the English Cotswolds, is famous for its arboretum. It is one of the oldest, largest, and finest collections of trees and shrubs in the world. Let us take a closer look at it. Beauty and Grandeur “No one remains untouched by... 

Diatoms, microscopic algae that encase themselves in ornate, exquisitely patterned glass shells, are found in prolific numbers in every ocean on earth. They have fascinated scientists for centuries—in fact, ever since the microscope was first invented...