730 results
- 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.
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- Humans
From the February 15, 1930, issue
ACRES OF PENGUINS IN ANTARCTICA Penguins by the acre are among the profusion of water animals inhabiting the regions adjacent to the desolate lands of Antarctica that help make its exploration of value, Dr. Isaiah Bowman, director of the American Geographical Society, told the American Philosophical Society. Dr. Bowman spoke in the 141-year-old hall of […]
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Red Snow, Green Snow
It's truly spring when those last white drifts go technicolor as algae bloom in the snow.
- Paleontology
Sea Dragons
About 235 million years ago, as the earliest dinosaurs stomped about on land, some of their reptilian relatives slipped back into the surf, took on an aquatic lifestyle, and became ichthyosaurs—Greek for fish lizards.
- Earth
Big Bergs Ahoy!
Although the break-up of Antarctica's northernmost ice shelves has been linked to warmer temperatures in the area, the cause of the unusual number of large icebergs calving from the continent's southern ice shelves last year was likely not global warming.
- Earth
Antarctic sediments muddy climate debate
Ocean-floor sediments drilled from Antarctic regions recently covered by ice shelves suggest that those shelves were much younger than scientists had previously thought.
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