Uncategorized
- Astronomy
Planet Quest
Need help in tracking discoveries of planets orbiting stars beyond our solar system? NASA’s new Planet Quest Web site offers one-stop shopping for planet discovery news. Check out the latest findings, search an atlas of extrasolar planets, and learn about NASA’s proposed missions to search for new worlds, particularly those that might harbor life. Interactive […]
- Materials Science
Flattery for Faience
By replicating ancient materials with their own hands, researchers are gaining new insights into details of Egyptian faience manufacture that have been lost for thousands of years.
- Planetary Science
Exploring the Red Planet
Searching for signs of subsurface water on the Red Planet and analyzing the elemental and mineral composition of surface rock, NASA's Mars Odyssey spacecraft begins its main mapping mission next month and may shed light on several enduring puzzles about the planet.
-
18986
If the stones in this article simply were used for grinding ocher to make powder, would not the grinder rough up the surface to make it a better grindstone? The marks may be nothing more than primitive knurls. Rather than art, this looks like a tool to me, not different in principle from flaked flint. […]
- Anthropology
Stone Age signs of complexity
Ancient engravings found in South Africa support the theory that humans began to think and behave in symbolic ways a surprisingly long time ago.
- Anthropology
The gene that came to stay
A gene thought by some scientists to foster a bold, novelty-seeking personality, as well as attention-deficit hyperactivity (ADHD), apparently spread substantially in human populations over roughly the past 40,000 years.
-
- Ecosystems
Tadpole Science Gets Its Legs . . .
The amazingly complex tadpole now shines in ecological studies.
-
Biological Dark Matter
The discovery that some genes encode RNA strands instead of proteins has surprised biologists.
- Health & Medicine
Viruses stop antibiotic-resistant bacteria
Bacteriophages, viruses that destroy bacteria, can protect mice from bacteria that are impervious to antibiotics.
- Chemistry
New structure reveals catalysts’ details
Researchers have created a new compound that contains a palladium atom bonded in a unique way to six silicon atoms.
-
19048
I seem to be missing something when I read articles that refer to the immense pressures at Earth’s core. If the source of gravity is mass and there’s equal mass in all directions at the core, then the core should be suspended in zero gravity. It’s very frustrating for me to get this wrong. Glenn […]
