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If you’ve ever commuted through New York City during rush hour, you’ve probably experienced stress-inducing traffic, over-stuffed subway cars, or delays that don’t care if you’ve given yourself an extra half hour. In 1924 the New York metropolitan area’s population was already large enough to get the Transit Commission thinking of ways to accommodate future traffic needs

Who we know determines who we are. Three new books reveal how much heroes and even distant acquaintances influence us.

Editor's note: This article originally appeared in the March 1961 issue of Scientific American. In the days when civilized men believed that the world was flat they had no reason to think about gravity. There was up and down

March 1961 Food for Climate Skeptics [More]

Every villain has his Achilles' heel. And microscopic scoundrels are no exception.

By Leigh Coleman BILOXI, Mississippi (Reuters) - Marine scientists are debating whether 80-plus bottlenose dolphins found dead along the U.S. Gulf Coast since January were more likely to have perished from last year's massive oil spill or a winter cold snap. [More]

By Amy Maxmen Precious memories need not fade if a report today bears fruit. [More]

A few years back, the sun went into a lull, its activity tailing off like a rambunctious child settling down for a nap. The lull was no surprise; it is a normal part of the sun's roughly 11-year cycle of activity, over which the number of magnetized regions known as sunspots waxes and wanes

As the familiar battles over evolution education continue to play out in U.S. state legislatures and school boards, other countries are facing very different dynamics. Much of the world lives outside of any law that requires separation of church and state, making creationism trickier to disentangle from public school curricula.

After decades of development and years of clinical trials, an optical prosthesis capable of restoring at least partial vision to those suffering from retina-damaging diseases will hit the market.

A collection of delicate stone tools discovered on California's Channel Islands indicates that early humans in the Americas were hunting local waterfowl some 11,200 to 12,200 years ago. [More]

BOSTON--A novel treatment for HIV could involve changing the genes in a person's immune cells and, ultimately, in his or her stem cells, as well. It might even lead to a cure for that deadly disease

If you had $1 billion to spend on just one project, what would it be? Here's how an astrobiologist, a broadcaster, a skeptic and a Nobel laureate, amongst others, would spend the money. Filmed at the 2010 Science Foo Camp in California, this is the last of four videos in this series.

By Timothy Gardner WASHINGTON (Reuters) - The U.S. Environmental Protection Agency's ability to protect citizens from premature death and other health problems would be gutted if Congress slashes funding as threatened by Republican lawmakers, its chief said on Wednesday

Whenever an endangered species lives in just one location, it is at increased risk of being wiped out by a single disease, fire or catastrophic weather event.