Uncategorized
- Earth
Pesticides block male hormones
Some common pesticides can block the ability of androgens, male sex hormones, to trigger normal gene activities.
- Earth
Weed killer feminizes fish
The weed killer atrazine can turn normally hermaphroditic fish into females, a new study shows.
-
- Materials Science
Worm’s teeth conceal odd mineral material
A worm's teeth contain a copper mineral that could serve as a model for new materials.
-
Memory grows up in 1-year-olds
As children enter the second year of life, they exhibit a marked improvement in recalling simple events after a 4-month delay, perhaps reflecting the growth of memory-related brain areas.
- Astronomy
Milky Way black hole gets real
Tracing the path of a star orbiting near the center of our galaxy, astronomers have found the best evidence to date that a supermassive black hole lies at the Milky Way’s core.
- Astronomy
Cosmic rays from the solar system
Dust grains from the Kuiper belt, a storehouse of comets and other frozen bodies in the outer solar system, are the source of some of the lower energy cosmic rays that bombard Earth.
- Health & Medicine
Schizophrenia spurs imaging network
Thanks to a federal grant, a team of researchers will establish a national database of brain images that will allow for expanded investigations of the neural basis of schizophrenia.
-
19197
The article notes that X-ray radiation from XTE J1550-54 jets is puzzling because the radiation of the nearer jet, which is moving toward Earth, isn’t as bright as that of the more distant jet. Perhaps as a jet strikes material, the radiation is dispersed back toward the jet source. Thus, the more distant jet could […]
- Astronomy
Jet Astronomy
For the first time, scientists have traced the slowing and dimming of X-ray-emitting jets from a black hole.
- Health & Medicine
Old Drug, New Uses?
A hormone called erythropoietin, long used to treat anemia, also seems to protect against nerve damage and holds promise as a new therapy for stroke and spinal cord injury.
-
19151
While reading your article regarding the primitive antibodies found in lancelets, it occurred to me that complex immune systems might be merely a highly specialized, evolved form of digestion. Presumably, evolutionary adaptation would tend to favor a critter that found a way to consume even those nasty, yucky, infectious microbes. Mel ZernowColusa, Calif.
