Uncategorized
- Health & Medicine
Making scents of Alzheimer’s
Among people with mild symptoms of memory loss, a limited ability to recognize smells—along with an inability to detect the disability—has been linked to the future development of Alzheimer's.
-
19392
Your article describes how the male bean weevil’s spiked reproductive part damages the female’s reproductive tract to reduce the chance that she will mate with other males. Could this also explain the barbs on the organ of the domesticated tom cat? I have read that the pain of copulation induces the female’s ovulation, but I […]
-
Bean weevils get a kick out of mates
Breeding in stored grain throughout the tropics, bean weevils represent an unusually clear example of the evolutionary male-female arms race.
-
Squirrels save for the family’s future
Some female red squirrels hoard extra food for youngsters that haven't yet been conceived.
- Astronomy
Nudging asteroid fragments toward Earth
New computer simulations detail how fragments of asteroids travel to Earth and rain down as meteorites.
-
19391
The article about tuberculosis states that Robert Koch in 1882 was the first person to link a particular microbe to a disease. References indicate that Armauer Hansen demonstrated in 1868 that Mycobacterium leprae was associated with the tissues of leprosy patients. He may not have had Koch’s postulates to prove this linkage, but many credit […]
-
- Astronomy
Invisible Universe
X-ray astronomy opens a new window on the most energetic cosmic events.
- Materials Science
New work improves stainless steel surface
A novel electrochemical method improves the surface of stainless steel without making the metal brittle or prone to corrosion.
- Animals
Second bird genus shares dart-frog toxins
Researchers have found a second bird genus, also in New Guinea, that carries the same toxins as poison-dart frogs in Central and South America.
- Planetary Science
Radio link may hamper a Titan probe
A recently discovered communications problem could prevent the Huygens probe from relaying all of its precious data when it parachutes through the cloud-bedecked atmosphere of Saturn's largest moon, Titan, in 2004.
-
Model explains bubonic plague’s persistence
A computer model of bubonic plague suggests rats can harbor the disease for years before a human epidemic breaks out.
