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Life may have existed on Venus 700 million years ago
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Here's what Venus would look with water, and without its thick CO2 atmosphereWhen we think of Venus, we envision a planet that'd make a great place for hell - fiery red, extremely hot, and toxic. However, a new study makes an argument that Venus may have once been able to support life, until a mysterious resurfacing event took all that away about 700 million years ago. According to planetary scientist Michael Way from NASA's Goddard Institute for Space Studies, Venus may have had a stable climate for billions of years. "It is possible that the near-global resurfacing event is responsible for its transformation from an Earth-like climate to the hellish hot-house we see today." The research – presented last week at the EPSC-DPS Joint Meeting 201 ...
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3777 |
bio_man |
4 years ago |
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What happens when chemicals build up or don't break down?
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Are humans really at the top? Yes. We are the top of the food chain (unless we are eaten by a shark!), but is it always beneficial to be at the top of the food chain? Usually food chemicals that we eat are used by our bodies and any waste is exhaled, defecated and urinated out of us. However, some chemicals such as heavy metals like lead and mercury can't be expelled from plants and animals so they build up in the plant and animal bodies. This is called biomagnification (biological magnification) because the amounts can accumulate more and more in animals further along the food chain till they reach a toxic level. In human-made environments, radio-active chemicals such as uranium are a problem because the time they take to break down (half-l ...
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2655 |
duddy |
11 years ago |
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2396 |
duddy |
9 years ago |
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A new rock formed out of plastic
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Plastic may be with us a lot longer than we thought! A new type of rock made from plastic, volcanic rock, sand, seashells, and corals has begun forming on the shores of Hawaii. The discovery adds to the debate about whether humanity’s heavy hand in natural processes warrants the formal declaration of a new epoch of Earth history.
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2003 |
duddy |
9 years ago |
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Hottest and weirdest place on Earth
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Dallol in Ethiopia is not only the hottest inhabited place on Earth, it's also one of the weirdest. Between 1960 and 1966, the average annual temperature was a toasty 35°C (96°F), but the temperature can regularly creep to over 46°C (115°f). At 48 metres below sea level, Dallol is Earth's lowest land volcano, and its last recorded eruption was in 1926. Its craters contains hot springs that boast a whole range of otherworldly colours - including neon yellow - thanks to the hot magma bubbling below the surface. This magma heats the groundwater that flows into the area from the nearby highlands, and as the heated groundwater moves up towards the surface, it dissolves salt, sulphur, potash and other minerals and deposits them in the Dallol crat ...
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1290 |
duddy |
9 years ago |
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