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Physics
Loud Loop: New explanation of whip-snapping unfurls
The wake of a loop zooming along a whip may silence the faster-moving tip so the loop actually causes the whip's loud bang.
By Peter Weiss -
Meeting Danielle the Tarantula
Insect zoos have no lions, tigers, or bears but can give plenty of thrills, courtesy of tarantulas, giant beetles, and exotic grasshoppers.
By Susan Milius -
Ecosystems
Move over, Leo. Give me more elbow room
The average size of the largest land animals on each of 25 oceanic islands and five continents strongly depends on the land area there.
By Sid Perkins -
Earth
Clipping the Fin Trade
New research and policy developments aim to curb the wasteful and gruesome practice of killing sharks solely for their fins.
By Janet Raloff -
Animals
Pregnant—and Still Macho
Some of the basic theories of sexual behavior and sexual selection are getting attention thanks to a burst of new studies in the topsy-turvy social world of the seahorse, where the males get pregnant.
By Susan Milius -
Physics
Double or Nothing
The hunt for a rare, hypothetical nuclear transformation known as neutrinoless double-beta decay may answer one of the most urgent questions in physics today: How much do elementary particles called neutrinos weigh?
By Peter Weiss -
Animals
Social Cats
Who says cats aren't social? And other musings from scientists who study cats in groups.
By Susan Milius -
Math
Fibonacci’s Chinese Calendar
In a book completed in the year 1202, mathematician Leonardo of Pisa (also known as Fibonacci) posed the following problem: How many pairs of rabbits will be produced in a year, beginning with a single pair, if every month each pair bears a new pair that becomes productive from the second month on? The total […]
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Faces of Perception
Scientists who study face perception currently disagree strongly over whether newborn babies innately know what human faces look like and whether certain brain areas are solely responsible for distinguishing one face from another.
By Bruce Bower