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19090
A pet dog doesn’t have to be hungry to enjoy chewing on a bone. Perhaps dire wolves did enjoy a “glorious paradise” 15,000 years ago. Without other predators to chase them away from a kill, they had more leisure time to hang about and chew the bone. Matt FenskeSpokane, Wash. From 15,000 to 12,000 years […]
- Paleontology
Bone Crushers: Teeth reveal changing times in the Pleistocene
Tooth-fracture incidence among dire wolves in the fossil record can indicate how much bone the carnivores crunched and, therefore, something about the ecology of their time.
- Physics
Law and Disorder: Chance fluctuations can rule the nanorealm
A tug-of-war in a water droplet demonstrates that random fluctuations wield more than enough muscle to give nanoscale machines trouble.
- Health & Medicine
Heart damage tied to immune reaction
Researchers in Brazil have identified immune proteins that flood the heart tissues of many people with Chagas disease, suggesting a cause of this deadly complication of the parasitic tropical disease.
- Astronomy
Pluto or bust?
A new National Research Council report may revive plans to send a spacecraft to explore Pluto and its neighborhood.
- Paleontology
Unknown creature made birdlike tracks
Paleontologists have found a multitude of birdlike footprints left by a yet undiscovered creature in rocks more than 60 million years older than Archaeopteryx, the first bird to have left fossils of its body parts.
- Health & Medicine
Gene might contribute to asthma risk
Variations in a gene called ADAM33 may predispose a person to asthma.
- Chemistry
Material could halt catalyst waste
New research suggests a way that carmakers might use less of expensive metal materials in automobiles' catalytic converters.
- Health & Medicine
Hormone therapy falls out of favor
Several studies now indicate that health risks associated with hormone replacement therapy for postmenopausal women outweigh its benefits.
- Archaeology
Ancient site yields a copper whopper
Excavations in Jordan revealed the largest known Early Bronze Age metal-production facility, where workers crafted high-quality copper tools and ingots beginning around 4,700 years ago.
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Men of Prey
Scientists have started to uncover the roots of rape and child molesting, although questions remain about whether it's possible to identify who will be a repeat sex offender or to provide effective treatment for such behavior.
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19022
All of the characteristics the researchers ascribe to sexual abusers–hostile masculinity, penchant for impersonal assembly-line sex, sexual preoccupation, emotional callousness, attention-deficit hyperactivity disorder–prevent them from forming enduring emotionally intimate attachments. Perhaps abusers turn to domination sex in the vain attempt to relieve their frustration through an imposed physical intimacy they control. Marilyn M. KramerWausau, Wis. […]
