News
- Materials Science
New gel could lead to cartilage repair
A new scaffold material that contains cartilage cells and encourages their growth could help scientists create living tissue replacements suitable for treating osteoarthritis and sports injuries.
- Animals
Hyena androgens exact high cost
Blocking androgens for spotted hyenas before they're born shows that the exposure of a female fetus to male hormones normally takes a heavy physical toll when females bear their own pups.
- Animals
Deer littermates have different dads
Twin fawns may not have the same dad—the first time multiple paternity has turned up in a large, free-ranging hoofed mammal.
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Barks are more than just “Hey, you!”
Computer analysis of thousands of dog barks suggests that our best friends may be signaling more than just a generalized "Hey you!"
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Such jokers, those Komodo dragons
A study of a young Komodo dragon reveals what a behaviorist says would be considered play if seen in a dog or cat.
- Plants
Bleeding Trees: Microbial suspect named in beech deaths
A microbe related to the one that caused the Irish potato famine may be killing majestic old beech trees in the northeastern United States.
- Health & Medicine
Retina Rescue: Adult stem cells form blood vessels in the eye
Stem cells derived from bone marrow can grow into new blood vessels in the eyes of mice, suggesting a way to treat eye diseases in people.
- Astronomy
Icy Split: Comet fragments into 19 pieces
A comet has split into 19 fragments strung out along a million-kilometer-long chain.
- Humans
Terrorism Repercussions: Scientists consider threats, opportunities after Sept. 11
A new report from the American Association for the Advancement of Science considers the potential effects on academic research of government policies proposed in response to the terrorism attack of Sept. 11, 2001.
- Astronomy
Cosmic Twist: X’s may mark spots where black holes merge
If whacked by a companion black hole, a big, jet-emitting black hole may spew superhot plasma in a new, crosswise direction.
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Resilient DNA: Gene may brighten future for abused kids
A long-term study in New Zealand indicates that a genetic variation associated with high concentrations of certain brain chemicals protects abused children from becoming violent and impulsive later in life.
- Earth
West Coast Shimmy: Smack from space triggered landslides along Pacific Coast
Scientists say they've found the first evidence along the Pacific Coast of massive landslides triggered by the impact from space 65 million years ago that's suspected to have wiped out the dinosaurs.
