Uncategorized
-
Health & MedicineFlawed Therapy: Hormone replacement takes more hits
Elderly women taking estrogen and progestin are more likely to develop dementia, including Alzheimer's disease, and stroke than are women not taking the hormones.
By Nathan Seppa -
Gut Check
The normal microbial inhabitants of our intestines do a lot for their host.
By John Travis -
AstronomyRed Team, Blue Team: Galaxy survey shows that color matters
Using the largest survey of galaxies ever compiled, astronomers have found that the cosmos divides sharply along color lines.
By Ron Cowen -
Planetary ScienceNew view of Earth
On May 8, 2003, scientists pointed a camera on board the Mars Global Surveyor probe back at Earth and captured the first image from another planet that shows our world as more than a point of light.