Which Birds Relative to Body Size Lay the Largest and Smallest Eggs?
Each female emperor penguin (Aptenodytes forsteri) lays one large egg. Initially, both sexes share in incubating the egg by carrying it on his or…
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Diameter
Where Would You Look for a Yard of Ale?
You would look for, and perhaps find, a yard of ale in an old public house or a tavern in England. It is a narrow tube, three feet long, ope
What Are Baigong Pipes?
What Are Baigong Pipes? The Baigong pipes are a series of pipe-like features found on and near Mount Baigong, about 40 km southwest of the c
Why Were the Stone Spheres of Costa Rica Made?
Why Were the Stone Spheres of Costa Rica Made? The most difficult question to answer is why the stones were made. What was their purpose? No
What Makes Hail?
During a thunderstorm, balls of ice, called hail, may fall. Hail starts as rain. Before the drops can fall, strong air currents carry them t