Earth
We summarize the week's scientific breakthroughs every Thursday.
- Earth
Possible snake shortage looms
Declines among species in Europe and Africa raise herpetologists’ worries of widespread population losses.
- Climate
With warming, some commercial fish may boom and bust
Higher temps in Arctic waters might be good for some species but not for others, new research suggests.
- Planetary Science
Before the Mississippi, minerals show ancient rivers flowed west
Michigan zircons uncover the path of an ancient river system across North America.
- Earth
Hazy antidote to a faint young sun
A new theory suggests atmospheric answer to the continuing paradox of why early Earth wasn’t icy.
- Animals
Diversified portfolio yields benefit for salmon stocks
Local diversity keeps sockeye from going bust every few years, a study finds.
- Archaeology
Jamestown settlers’ trash confirms hard times
Analyses of discarded oyster shells confirm a deep drought during the Virginia colony’s earliest years.
- Ecosystems
Honeybee death mystery deepens
Government scientists link colony collapse disorder to mix of fungal and viral infections.
- Paleontology
Octopus origins
After examining more than 90 new specimens of Nectocaris pteryx, paleontologists put it near the root of the cephalopod evolutionary tree.
- Earth
BP’s estimate of spill rate is way low, engineer suggests
“It’s not rocket science.” That’s how a Purdue University mechanical engineer described his calculations of startling amounts of oil spewing into the Gulf of Mexico from fissures in heavily damaged piping at a BP drill site. During a May 19 science briefing convened by a House subcommittee, Steve Wereley walked members of Congress through his use of particle image velocimetry to explain how he and other engineers track changes in video images of gases or liquids to estimate the volumes billowing before their eyes.
- Chemistry
Exposure of moms-to-be to hormone-mimicking chemical may affect kids years later
In mice, BPA can cause pregnancy complications that can also trigger later metabolic effects in both moms and grown male offspring.
- Climate
Oceans warmed in recent decades
Measurements show a trend of rising temperatures along with a leveling off since 2003.
- Chemistry
A new source of dioxins: Clean hands
Manufacturers have been adding the germ fighter triclosan to soaps, hand washes, and a range of other products for years. But here’s a dirty little secret: Once it washes down the drain, that triclosan can spawn dioxins.
