An amateur astronomer has picked up signals from a satellite NASA gave up for dead more than decade ago.
Scott Tilley was scanning the skies for secret military satellites when he picked up a transmission from the Imager for Magnetopause-to-Aurora Global Exploration (IMAGE) satellite.
Alternative energy sources like wind offer a way to lessen a country’s carbon footprint. But global warming trends could soon change the way the wind blows.
As rapid arctic warming shrinks the heat gap between the North Pole and equator, Northern Hemisphere winds could lose some oomph — up to 40 percent over the next century, depending on region.
City lights drive back the night a little more each year, disrupting ecological cycles, and the switch from orange-yellow sodium lights to bluish-white LEDs might be making the problem worse.
This week marks 25 years since more than 1,700 scientists, led by the Union of Concerned Scientists, issued a “warning to humanity” concerning the costs of continued environmental destruction.
Now, they’ve issued another — this one signed by 15,000 scientists representing 184 countries.