763 results
- Paleontology
A human migration fueled by dung?
When people made their way from Asia to the Americas, the path they took may have been covered in dung.
- Astronomy
Revved-up antics of a pulsar jet
Flailing like an out-of-control fire hose, a mammoth jet of charged particles gushing from a collapsed star is varying its shape and brightness more rapidly than any other jet known in the heavens.
- Paleontology
L.A.’s Oldest Tourist Trap
Modern excavations at the La Brea tar pits are revealing a wealth of information about local food chains during recent ice ages, as well as details about what happened to trapped animals in their final hours.
- Paleontology
Fertile Ground: Snippets of DNA persist in soil for millennia
Minuscule samples of sediment from New Zealand and Siberia have yielded bits of DNA from dozens of animals and plants, including the oldest DNA sequences yet found that can be traced to a specific organism.
- Humans
From the June 14, 1930, issue
WELLAND CANAL Slightly more than a century after the falls and rapids of Niagara were first overcome for water transportation by a canal only 8 feet deep, there has been completed on practically the same site a mammoth structure that will pass giant 600-foot lake grain vessels up and down the 326.5-foot difference in elevation […]
- Astronomy
Celestial Divide: Finding two families of galaxies
By analyzing data from a mammoth sky survey, astromoners have found that galaxies divide into two distinct families, depending on their stellar mass.
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From the January 11, 1930, issue
THOMAS H. MORGAN GIVEN NEW HONOR The American Association for the Advancement of Science has chosen Dr. Thomas Hunt Morgan to succeed the eminent physicist Dr. Robert Andrews Millikan as president. To many the name of Thomas Hunt Morgan is synonymous with the modern theory of the gene as the determining factor in heredity. Upon […]
- Astronomy
Pluto or bust?
A new National Research Council report may revive plans to send a spacecraft to explore Pluto and its neighborhood.
- Archaeology
New World hunters get a reprieve
New radiocarbon evidence indicates that, beginning around 11,000 years ago, human hunters contributed to North American mammal extinctions that had already been triggered by pronounced climate shifts.
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- Anthropology
Drowned land holds clue to first Americans
A map of a now-flooded region charts the path that Asians may have taken to first reach the Americas.
- Astronomy
Repainting the cosmic palette
After all the hue and cry about the color of the universe, astronomers have now revised their findings: It’s not pale green, but boring old beige.
