BBC News - Science & Environment

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Scientists from the University of Birmingham have released the most complete database that identifies and maps wild crop relatives around the world, vital for future food security.
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A meteorite that landed near the Nicaraguan capital Managua on Sunday could have come from the 2014 RC asteroid which was passing the earth at the time, experts have said.
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Scientists are exploring why it is so difficult at accurately measure the Newtonian constant of gravity.
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Archaeologists date the weapon to the Shang or Zhou dynasties - the dawn of Chinese civilisation.
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A small meteorite which may have broken off an asteroid caused a 12m-wide crater near Managua's international airport, Nicaraguan officials say.
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A 60-foot asteroid will fly close to Earth on Sunday, but is not expected to pose any danger, US space agency Nasa says.
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Research led by experts at Harvard University shows technology can be used to send a simple mental message from one person to another without any contact between the two.
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Researchers believe that California blue whales have recovered in numbers and the population has returned to sustainable levels.
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Ebola: How bad can it get?
06 Sep 2014 1:25:05
Ebola outbreak takes turn for worse - can it be stopped?
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How to take the perfect photo
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Fossils unearthed in Argentina represent the most complete giant sauropod dinosaur ever discovered.
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More than 1,000 delegates, including heads of state and business leaders, consider ways to trigger a green revolution and improve food security in Africa.
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Researchers believe that California blue whales have recovered in numbers and the population has returned to sustainable levels.
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Scientists say the jets of water that archer fish use to shoot down prey are precisely tuned, to make maximum impact at just the right distance.
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Tim Wilmot has spent 25 years converting his suburban garden into a tropical paradise.
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Incredible images from the Curiosity Rover
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Fossils unearthed in Argentina represent the most complete giant sauropod dinosaur ever discovered.
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Electronic chopsticks that can detect whether food is unsafe to eat are shown off by Chinese tech company Baidu.
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The rich marine life off Tanzania's coast is coming under threat because of blast fishing - a technique using explosives that some fishermen use to maximise their catch.
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"Food crime" is occurring on an unprecedented scale worldwide, a new report to be published on Thursday is expected to say.
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A mushroom-shaped deep sea animal discovered off the Australian coast has defied classification within the tree of life.
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The huge stores of carbon locked in the world's soils are more vulnerable to rising temperatures that previously thought.
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The power units needed to drive a 1,000mph car
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The first British person to contract Ebola during the outbreak in West Africa has made a full recovery, after being treated in a specialist NHS unit.
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A giant Archimedes screw is lowered into place as part of Lancashire community project to generate power.
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