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NASA's First Historic Challenge

In a time of uncertainty at home and abroad, an American president proposes bold new steps in the exploration of space. He calls for 'longer strides' which 'may hold the key to our future here on Earth.' He touts the potential of 'even more exciting and ambitious exploration of space, perhaps beyond the moon, perhaps to the very end of the solar ...

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NASAsFirstHistoricChallenge
Biology

An Invasion of Infiltrators

Why might a species be invasive in one country but not a big problem in its native land? As an example, consider a plant that is a major weed in the U.S. but in its native land it may be a minor pest. ... Continue reading

Infiltrators
Astronomy

Uncharted Meteors

In 1967, NASA's Mariner 4 spacecraft was cruising through the solar system, not far from Earth, when something unexpected happened. 'Mariner 4 ran into a cloud of space dust,' says Bill Cooke of the ... Continue reading

UnmappedMeteors
Engineering

Snakebots Coming Your Way

Early robots were stiff, clumsy machines that plodded in straight lines. More modern robots can be radio controlled and move with much more grace and precision. Snakebots, though, can weave through ... Continue reading

Snakebots
Physics

Coming In Strong On Your AM Dial

The AM radio dial would be nothing but chaos and noise without a very basic rule - turn down the power at night. The Federal Communications Commission (FCC) controls and regulates the airwaves in the ... Continue reading

AMRadioWaves

Cougars, A Jumping Star

CougarsAJumpingStarCougars would make great basketball or track-and-field players. Of all the big cats, they are the best jumpers. They can jump 40 feet forward from a standing position, and 15 feet or higher straight up - higher than a basketball hoop.

They're strong, too. A cougar, weighing typically 130 pounds but as much as 200 pounds, can use its jaw to kill an elk four to five times its weight, by leaping onto the animal's back and breaking its spinal cord at the base of its skull. The cougar can kill almost any animal, but it avoids bad odds, keeping clear of wolves, grizzly bears, and other big cats. But its killing prowess is only one reason you probably wouldn't want a cougar on your team.

The cougar is a solitary cat, rarely seen; Native Americans once called it the 'ghost walker.' It avoids other animals and even, except when mating, other cougars. It roams a territory as large as 300 square miles, and on the rare occasion it does meet up with another cougar, it isn't likely to fight over its territory--much less go the distance to cross the finish line or slam dunk the winning two points for your team.