Ewe Again? Cloning from Adult DNA

Turning science fiction into fact, scientists have used DNA from an adult sheep to create a genetically identical copy, or clone, of the animal. Related links...

Potent toxin complicates heart repair

People with weak defenses against a potent bacterial toxin found in the gut are more likely to suffer problems after surgery.

51 Pegasi: A star without a planet?

The report in 1995 of the first planet detected around a sunlike star may be wrong. Related links...

Mud time line clarifies dinosaurs' demise

A new ocean core sample tells the clearest story yet of how a comet or meteor impact changed life on Earth 65 million years ago.

German mine yields ancient hunting spears

Excavations have uncovered the world's oldest known hunting weapons, a set of three wooden spears that appear to have been hurled at large game animals around 400,000 years ago.

Clockwork sex of coral reef algae

In the Caribbean waters off Panama, green algae synchronize their exuberant sex lives. Related links...

Research Notes:

Biochemistry:

Paternal smokers' cancer legacy

Men who smoke can pass on genetic damage that predisposes their offspring to cancer.

Vitamin E helps—but don't overdose

Most vitamin E supplements appear to offer good protection against oxidant damage to the body.

Physics:

Satellite makes solar wind count

The Solar Heliospheric Observatory gives scientists information about the composition of the solar wind. Related links...

Atoms as the smallest quantum bits

A single electromagnetically trapped ion could serve as a bit in quantum computers of the future. Related links...

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