Uncategorized
- Math
Dogs Catching Frisbees
When navigating to intercept a thrown Frisbee, dogs appear to use the same geometric strategy that a baseball fielder employs to snag a fly ball hit into the outfield.
- Humans
From the June 30, 1934, issue
A beetle's eye view of George Washington, cosmic rays, and visualizing air currents around airplanes.
- Paleontology
Neck Bones on the Menu: Fossil vertebrae show species interaction
Three fossil neck bones from an ancient flying reptile—one of them with the broken tip of a tooth embedded in it—indicate that the winged creatures occasionally fell victim to meat eaters.
- Plants
Rewriting the Nitrogen Story: Plant cycles nutrient forward and backward
For the first time, a green plant has been found to break down nitrogen-containing compounds into the readily usable form of nitrates, a job usually done by microbes.
- Anthropology
Erectus Experiment: Fossil find expands Stone Age anatomy
A 930,000-year-old fossil cranium found in Africa widens the anatomical spectrum of Stone Age human ancestors and expands debate over how they evolved.
- Health & Medicine
Before the Booze: Cactus extract dulls hangovers
An inflammation-fighting plant extract, taken hours before consuming alcohol, appears to suppress some of the symptoms brought on by a bout of heavy drinking.
- Astronomy
Powerhouse Astronomy: Blazing black hole from the early universe
A jet of matter and radiation emanating from a newly discovered black hole could provide a new probe of the first stars and the radiation left over from the Big Bang.
- Tech
Sweet Frequency: Implantable glucose sensor transmits data wirelessly
Modeled after antitheft magnetic strips, a new implantable glucose sensor for diabetes patients could do away with daily pinprick tests.
- Health & Medicine
SARS Control: First nasal vaccine effective in monkeys
An experimental SARS vaccine, tested in monkeys, can be administered directly to the respiratory tract and requires only a single dose to confer immunity.
- Earth
Sky Lights
Devoted to atmospheric optics, this Web site offers beautifully illustrated explanations of spectacular phenomena ranging from rainbows to ice haloes. Created by physicist Les Cowley, it features amazing images, along with explanations of how the imaged effects were created by nature. The ice halo section offers downloadable software for simulating various types of halos. Go […]
- Animals
Ultrasound alarms by ground squirrels
Richardson's ground squirrels may occasionally use ultrasound when calling out in response to a disturbance.
-
19436
I don’t think anyone should be surprised that squirrels have figured out how to say “nyah, nyah” to rattlesnakes. After all, it’s what they’ve been saying to cats, dogs, and bird-feeder owning humans for years. R. Kelly WagnerAustin, Texas
