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Run by teenagers, for teenagers, the Green Crew helps students get their hands dirty with projects like tree planting, trail restoration and invasive species removal.

Chicago is one of the most dangerous cities in the United States for migrating birds, and a glassy lakefront conference center was especially lethal.

These gentle giants have poor eyesight and may not be able to see fishnets and boats with which they have fatal encounters.

An unlikely group is coalescing around the health secretary's drive for restrictions on atrazine, which is linked to cancer, birth defects and low sperm counts.

Agency leaders said there was evidence to justify approval only for older people and those with medical conditions. Many others may not be able to get the shots.

Researchers studied data from a million people and found evidence that a height gene shared by both sexes is amplified in men.

Male capuchin monkeys on a Panamanian island were documented carrying around infant howler monkeys for no clearly discernible reason.

Richard Garwin's role in designing the hydrogen bomb was obscured from the public, even his family, as he advised presidents and devoted his life to undoing the danger he created.

Here's how to protect your skin and the environment this summer.

While prognoses for prostate cancer patients were once measured in months, experts say that advances in treatment and diagnosis now improve survival by years.