Uncategorized
- Math
Buses on Quantum Schedules
Anyone who has waited for a bus in the city has probably casually observed that, after an inordinately long wait, two or three buses often come along at the same time. The question of why such bunching seems to happen has prompted all sorts of speculation. Some claim that bus bunching is actually a rare […]
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Did males get bigger or females smaller?
It's time to stop assuming that standard gender differences in birds come from males getting bigger rather than from females getting smaller.
By Susan Milius - Physics
Frigid ‘dynamite’ assembles into superatom
Although it's now the fifth element to be made into the strange state of ultracold matter known as Bose-Einstein condensate, helium may prove to be the most revealing so far because of unusually high energies within the newly condensed atoms.
By Peter Weiss - Health & Medicine
Veggies prevent cancer through key protein
An international team of researchers has identified a protein that helps compounds in some vegetables prevent cancer.
By Linda Wang - Astronomy
Some of galaxy’s dark matter comes to light
A new study adds to the evidence that astronomers have unveiled some of the dark matter in our galaxy and that it's pretty ordinary stuff—white dwarfs, the cold, compact embers of low-mass stars.
By Ron Cowen - Earth
Thick ice scraped rock bottom in Arctic
Scuffs, scrapes, and gouges found atop undersea plateaus and ridges in the Arctic Ocean suggest that kilometer-thick ice shelves covered much of the ocean there during some previous ice ages.
By Sid Perkins - Health & Medicine
Study reveals male link to preeclampsia
Men who were born of mothers who had the pregnancy complication preeclampsia are roughly twice as likely to father a child through preeclamptic pregnancy than are men who were born of mothers who had a normal pregnancy.
By Nathan Seppa - Tech
New nanosize detector picks through DNA
Researchers have made a device that can differentiate nearly identical DNA molecules, which might lead to sequencing at unprecedented speeds.
- Anthropology
Fossil Skull Diversifies Family Tree
A 3.5-million-year-old skull found in Kenya represents a group of species in the human evolutionary family that evolved separately from australopithecines such as Lucy's kind in Ethiopia.
By Bruce Bower - Earth
A quick recovery after dinosaur deaths
Evidence from 65-million-year-old sediments suggests that a single impact from space wiped out the dinosaurs and that ecosystems recovered from the trauma in only a few thousand years.
By Sid Perkins - Earth
New analysis rejuvenates Himalayas
The Asian mountain range that includes some of the tallest peaks in the world turns out to be about 15 million years younger than geologists previously thought.
By Sid Perkins -
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As I recall, the Germans tried using diesels to power aircraft, but because diesels were not as responsive as gasoline-powered engines and heavier, they did not progress. That, it seems, was very fortuitous, given this surprising discovery that diesel-exhaust pollution increases with increased altitude. Anibal José da Silva Houston, Texas
By Science News