Warming adds to pressure on bats

Across the world, bats are in trouble from climate change – not only through collisions with the wind turbines that are intended to mitigate its effects, but from what the increasing warmth does to their ability to find their prey. Bats often get a bad press, portrayed as disease-spreading bloodsuckers. In fact, they perform a vital role as pollinators, seed […]

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How Sea Ice Forms

Sea ice is formed from ocean water that freezes. Because the oceans consist of saltwater, this occurs at about minus 1.8 degrees Celsius (28.8 degrees Fahrenheit). Most Antarctic sea ice occurs annually, meaning it forms in the winter and melts during the summer. Sea ice regulates exchanges of heat, moisture and salinity in the polar oceans. It insulates the relatively warm […]

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Obese Americans

American men are weighing in at an average of 196 pounds—16 pounds more than in 1990, a new Gallup survey has found.The average weight for women jumped 14 pounds—to 156 pounds— over the same period. Gallup estimates 62 percent of Americans are either overweight or obese.

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