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24 April 2014 11:45 am ,
Vol. 344 ,
The National Institutes of Health is revising its "two strikes" rule, which allowed researchers only one chance to...
By stabilizing the components of retromers, molecular complexes that act like recycling bins in cells, a recently...
Fossil fuels power modern society by generating heat, but much of that heat is wasted. Semiconductor devices called...
Researchers are gaining insights into what made Supertyphoon Haiyan so powerful and devastating through post-storm...
Millions around the world got a first-hand look at what it was like to be in Tacloban while it was pummeled by...
Major climate data sets have underestimated the rate of global warming in the last 15 years owing largely to poor data...
The tsetse fly is best known as the vector for the trypanosome parasites that cause sleeping sickness and a disease in...
- 24 April 2014 11:45 am , Vol. 344 , #6182
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ScienceShot: Venus, Doomed From the Start?
29 May 2013 1:00 pm
Was young Venus an Eden or a hell? Though the planet is closer to the sun than Earth is, our star was dimmer in those early years, so Venus—about the same size and mass as Earth—may have been cool enough to host oceans and even life. But new work published online today in Nature dashes that hope. Both Earth and Venus were born hot, with molten surfaces and probably thick steam atmospheres. Because Earth was farther from the sun, however, its surface cooled and solidified fast, within 4 million years; when rain fell out of the steamy atmosphere, it landed on solid ground and created oceans. In contrast, the new calculations indicate that Venus was probably doomed: Its proximity to the sun kept its surface hot and molten for up to 100 million years, preventing the formation of oceans. Instead, during that lengthy time, steam remained in the air, so sunlight split the water vapor into hydrogen and oxygen. The lightweight hydrogen escaped into space, leaving Venus dry and barren forever.
See more ScienceShots.