People always wonder how the moon was made. The birth of the planets 4.5 billion years ago was extremely violent. They grew to full size by absorbing rival planet embryos in a series of titanic collisions—one of which probably gave Earth its moon (below). The moon’s large size, low density, and other features suggest that it emerged from an explosion […]
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NASA has initiated the DART mission, short for Double Asteroid Redirection Test. It was launched from Vandenberg Space Force Base, California to study the effects of asteroid deflection as a method to save the Earth from future devastating collisions by asteroids. The big question…. If an asteroid is pummeling towards Earth, can humanity be saved with a simple nudge? NASA […]
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When we see a magical light show from the sun it is called “stretched loops” that are visible when the sun is rotated showing its profile to the earth. These lights move along a magnetic line that shows us these yellow lights that are charged particles of ultraviolet light. In about 5 billion years the sun will shine its last […]
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Earth got off relatively easy last week after being hit by the biggest blast of solar radiation since 2005—but we may not be so lucky next time. Last week’s coronal mass ejection, in which a solar flare whipped an arc of magnetic particles toward Earth at 4 million mph, led some airlines to reroute flights away from the poles, where […]
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Since the late 1990s, when they began decoding the human genome, scientists have believed that 98 percent of DNA is “junk,” with no function. But new research shows that most of this genetic material serves as switches that turn genes on or off, which could explain why some people predisposed to certain diseases get them, while others don’t. Our genome […]
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Sunspot activity may be entering a lull for the first time in almost 400 years, offering scientists a rare chance to gauge how solar conditions affect Earth’s climate. “This is highly unusual and unexpected” says Frank Hill, a researcher at the National Solar Observatory. Three new NSO studies suggest that the sun’s fluctuating magnetic field may soon become too weak […]
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Scientists typically believe that dark matter behaves in a simple way: if one clump encounters another, the two interact solely through gravity. However, researchers have published findings which suggest that there’s more involved. They’ve noticed dark matter (the blue lines in the photo above) lagging behind a galaxy due to friction, hinting that there are factors beyond gravity at work. […]
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“It has happened,” said Philip Bump. For the first time in human history, atmospheric carbon dioxide levels hit a daily average of 400 parts per million (ppm) last week. “There is now more carbon dioxide in the atmosphere than at any point since 3 million years ago.” Back then, global temperatures were about 7 degrees higher, the Arctic was ice-free, […]
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Like many human families, killer whales often rely on the wisdom of matriarchs to help them endure hardships and thrive, new research has found. Male orcas usually live for about 50 years, but females often survive well into their 90s, making them one of the few mammalsthat live for decades after they stop reproducing. Marine scientists studied the behavior […]
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Major depression is not only psychologically crippling but can also age a person’s body on a cellular level. That’s the conclusion of a new study that examined blood samples from more than 2,400 people with and without depression. Researchers at the Free University of Amsterdam measured the length of telomeres, the small caps at the ends of chromosomes that protect […]
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