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Science

Autonomous rendezvous system overcomes simulated spacecraft failures in lab tests

Science via Phys.org
Quick Read

There is a problem in low Earth orbit, and it's growing. According to the European Space Agency, there are about 19,440 satellites on orbit, 3,540 of which are nonfunctioning and/or not emitting a signal to warn other spacecraft of their location. The need to service these sleepwalking satellites in space will only increase as more are launched.

There is a problem in low Earth orbit, and it’s growing. According to the European Space Agency, there are about 19,440 satellites on orbit, 3,540 of which are nonfunctioning and/or not emitting a signal to warn other spacecraft of their location. The need to service these sleepwalking satellites in space will only increase as more are launched.

Source: Phys.org

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Why the tropics lose the most birds when cities expand

Tropical ecosystems are famous for their teeming, exuberant diversity. In fact, the dramatic increase in biodiversity from the poles to the tropics—known as the latitudinal diversity gradient—is pervasive across branches of the tree of life, and fossil evidence suggests it has existed for millennia.

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Personalized savings reminders can help boost retirement savings

Private retirement savings are an increasingly important topic in public debate. One popular idea is to phrase savings reminders in one of two ways: either you emphasize what someone stands to lose if they don't save, or you emphasize what they stand to gain if they do. To date, research into which of the two reminder messages is more effective in terms of influencing people's efforts to save has produced conflicting results.

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Student finds proof of rare wild cat in northern New Mexico

Armed with dozens of motion-sensing cameras, William Grooms spent this past summer documenting wildlife across Carson National Forest in northern New Mexico. It was his first field season collecting photos for a two-year study to understand how forest structure influences biodiversity in the Southern Rocky Mountains.

via Phys.org