Uncategorized
- Astronomy
Cosmic Doomsday Scenario: Phantom energy would trigger the Big Rip
According to a new model, the universe may end with a Big Rip—every galaxy, star, planet, molecule, and atom torn asunder and the cosmos ceasing to exist some 21 billion years from now.
- Humans
Doctoral seesaw
Throughout most of the 1990s, the number of doctoral degrees that U.S. universities awarded in science and engineering climbed steadily, to 27,300 in 1998, but by 2001, the number had dropped to 25,500, the lowest number since 1993.
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Feline Finding: Mutations produce black house cats, jaguars
Mutations in two different genes, which lead to black fur in house cats, jaguars, and jaguarundis, may have protected the black felines from an epidemic long ago.
- Health & Medicine
Miscarriages foretell heart trouble
Women who spontaneously lose one or more fetuses during early pregnancy are about 50 percent more likely than other women to later suffer ischemic heart disease.
- Health & Medicine
Pregnancy Woe Uncovered: Protein may underlie preeclampsia
New evidence links a placental protein to preeclampsia symptoms and may lead to new ways of detecting and treating the disease.
- Health & Medicine
Portrait of a cancer drug at work
Newly revealed protein structures show how a breast cancer drug functions.
- Health & Medicine
Why beer may deter blood clots
Downing a beer a day alters the structure of fibrinogen, a blood protein active in clotting.
- Archaeology
Grave surprise rises in Jamestown fort
Excavations in the 17th-century fort at Jamestown, Va., have yielded a grave containing the skeleton of a high-ranking male colonist.
- Health & Medicine
When Drinking Helps
Sometimes a nip of alcohol can indeed prove therapeutic, though usually not until middle age.
- Ecosystems
Spring Forward
Scientists who study biological responses to seasonal and climatic changes have noted that the annual cycles for many organisms are beginning earlier on average, as global temperatures rise.
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19303
You state in this article that in the last century, the average global temperature has risen about 0.6C. I suspect that most of the sensors in use today are not in the precise locations of thermometers 100 years ago. Also back then, there were wide areas of the globe that were probably not being monitored […]
- Math
Turtle Tracks
One way to describe a geometric figure is in terms of the path generated by a moving point. Instead of defining a square, for example, as a four-sided polygon with equal sides and angles, you can call it the path generated by the following rule: Go straight for a distance s, turn 90 degrees right, […]
