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19383
The observations in this article are of stars and galaxies billions of light-years away and billions of years old. Has anyone ever thought about what the universe out there looks like today? Earl RosenwinkelDuluth, Minn. People have thought about what the universe looks like now and what it will look like in the distant future, […]
- Astronomy
Wrenching Findings: Homing in on dark energy
In an analysis of a group of distant supernovas, astronomers have found hints that dark energy is distributed uniformly throughout space.
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19382
Your article describes a great theory in a theoretical world. The purpose of a coin toss is to determine an outcome in the real world, however. Did the guys doing the various analyses factor in the effect of the coin bouncing on the ground or being fumbled in an attempted catch? Ed EiermanRomney, W.Va. The […]
- Math
Toss Out the Toss-Up: Bias in heads-or-tails
Coin tossing is inherently biased, with the coin more likely to land on the same face it started on.
- Materials Science
Hard Stuff: Cooked diamonds don’t dent
When exposed to high heat and pressure, single-crystal diamonds become extraordinarily hard.
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- Anthropology
Linguists in Siberia record dying tongues
Researchers trekking through remote Russian villages have identified and interviewed some of the last remaining speakers of two Turkic languages.
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Microbe exhibits out-of-body activity
New evidence indicates that anthrax bacteria may sometimes live freely and reproduce in soil, perhaps exchanging genes with other bacteria, instead of staying dormant in spores.
- Animals
Feral breed lacks domestic dogs’ skill
Wild dogs that haven't lived with people for 5,000 years share little of the capacity of their domesticated cousins for interpreting human gestures.
- Health & Medicine
HIV infects 1 in 100 in New York
A change in how New York City officials identify and track cases of HIV infection has yielded the clearest picture yet of how deeply rooted that city's epidemic has become.
- Health & Medicine
Primate virus found in zoo workers
Viruses related to HIV can be found in the blood of some zoo staff and other people who work with primates, although the infections don't appear to be harmful.
- Archaeology
How agriculture ground to a start
A major advance in agriculture occurred around 11,000 years ago, when western Asians began to walk through patches of wild barley and wheat and scoop handfuls of ripened grains off the ground, a report suggests.
