News tagged with winter temperatures

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Pennsylvania snowshoe hares differ from those in Yukon

Snowshoe hares in Pennsylvania—at the southern end of the species' range—show adaptations in fur color and characteristics, behavior and metabolism, to enable them to survive in less wintry conditions than their far northern ...

dateAug 01, 2017 in Ecology
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Chillier winters, smaller beaks

Although Charles Darwin lived and worked in the 19th century, modern evolutionary biologists are far from exhausting all avenues of inquiry regarding birds and evolution. For example, in the 1990s, researchers such as Russ ...

dateJul 13, 2017 in Evolution
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Image: SOHO's summer solstice sun

Residents of Earth's northern hemisphere enjoyed the greatest number of daylight hours in a single day all year on 21 June 2017. This summer solstice occurs when the tilt of Earth's axis is most inclined towards the sun, ...

dateJun 26, 2017 in Space Exploration
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