786 results
786 results for: Mammoths
- Humans
Letters from the August 18, 2007, issue of Science News
Exhaustive analysis I would debate the “1,000 watts or more” value attributed to typical adults during strenuous exercise (“Powering the Revolution: Tiny gadgets pick up energy for free,” SN: 6/2/07, p. 344). Hiking up steep slopes, I rarely exceed 250 W myself, and typical hikers are going much slower. The 1,000-watt figure can only apply […]
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Rather than concluding that the object that hit Canada 12,900 years ago was a comet, I wonder whether there might not be an alternate reason that geologists haven’t discovered a large hole. If a meteor hit a kilometer-thick glacier, would it have left a crater in the rock underneath the ice? Peter ShorWellesley, Mass. Scientists […]
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Mammoths: Blondes and brunettes?
The wool of woolly mammoths may have come in at least two shades.
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No gene is an island
Even as biologists catalog the discrete parts of life forms, an emerging picture reveals that life’s functions arise from interconnectedness.
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- Earth
Yellowstone Rising: Magma floods into chamber beneath park
Some parts of the terrain in Yellowstone National Park have been rising as much as 7 centimeters per year as molten rock wells up beneath the park.
- Earth
Ice Age Ends Smashingly: Did a comet blow up over eastern Canada?
An extraterrestrial object apparently exploded above Canada about 12,900 years ago, sparking devastating wildfires and triggering a millennium-long cold spell.
- Paleontology
DNA analysis reveals extinct type of wolf
New genetic analyses of the remains of gray wolves found in Alaska indicate that a distinct subpopulation of that species disappeared at the end of the last ice age, possibly because of its dietary habits.
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Sperm in frozen animals still viable years later
Sperm stored inside frozen organs or whole animals can produce healthy offspring years later.
- Paleontology
Mammoth Findings: Asian elephant is closest living kin
DNA studies suggest that the woolly mammoth is more closely related to the Asian elephant than to the African elephant.
- Anthropology
Children of Prehistory
Accumulating evidence suggests that children and teenagers produced much prehistoric cave art and perhaps left behind many fledgling attempts at stone-tool making as well.
- Paleontology
Tusk analyses suggest weaning took years
Changes in the proportions of various chemical isotopes deposited in mammoth tusks as they grew have enabled scientists to estimate how long it took juvenile mammoths to become fully weaned.
