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The anatomy of petal drop in sunflowers

Despite their consumer popularity as cut flowers, some sunflowers are difficult to market because of their tendency to lose petals soon after their flowers open. This characteristic, "petal drop", which in some varieties ...

dateJan 14, 2015 in Plants & Animals
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Super-Earths have long-lasting oceans

For life as we know it to develop on other planets, those planets would need liquid water, or oceans. Geologic evidence suggests that Earth's oceans have existed for nearly the entire history of our world. ...

dateJan 05, 2015 in Astronomy
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