Uncategorized
- Earth
It’s high tide for ice age climate change
Tides may sometimes be strong enough to tug Earth into an ice age.
- Tech
Beads and glue defeat forgers
Researchers have devised a cheap, translucent material that, when embedded in credit cards and other items, would endow the items with unique identifiers that are almost impossible to tamper with or copy.
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Trashed proteins may help immune system
Up to 30 percent of a cell's proteins get recycled as soon as they roll off the cellular assembly line.
- Earth
Moderate flows help carve rivers
Measurements of erosion in a rocky river channel in Taiwan suggest that the day-to-day flow of water accounts for more rock wear there than occasional catastrophic floods do.
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Gene found for big, firm sheep rumps
Scientists have found the gene that gives sheep unusually big, muscular bottoms.
- Astronomy
Are solar eruptions triggered a loopy way?
Astronomers have identified a new solar mechanism that may explain some coronal mass ejections.
- Health & Medicine
Panel ups RDAs for some antioxidants
An Institute of Medicine panel reported that dietary antioxidants such as vitamins A and E can limit cellular damage from free radicals but warned that studies in people have never adequately established a direct connection between antioxidant consumption and prevention of chronic disease.
- Tech
Ribbon to the Stars
Advances in one of the tiniest of technologies—carbon nanotubes—is bringing the concept of a space elevator closer to reality.
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A Man’s Job
Sperm contain an unexpected payload of RNA, a discovery offering insight into infertility, cloning, and contraception.
- Animals
Music without Borders
When birds trill and whales woo-oo, we call it singing. Are we serious?
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Colossal study shows amphibian woes
The largest amphibian data set ever crunched—936 populations in 37 countries—confirms global declines.
- Archaeology
Early New World Settlers Rise in East
New evidence supports the view that people occupied a site in coastal Virginia at least 15,000 years ago.
