Sources:

Sources may not be available for all articles

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...

Sources:

Ian Wilmut
Roslin Institute (Edinburgh)
Roslin, Midlothian EH25 9PS
United Kingdom

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.

Sources:

Elliott Bennett-Guerrero
Department of Anesthesiology
The Mount Sinai Medical Center, Box 1010
1 Gustave L. Levy Place
New York, NY 10029-6574

Robert G. Johnson
Department of Cardiovascular Surgery
The Beth Israel Medical Center
330 Brookline Avenue, Dana 905
Boston, MA 02115

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...

Sources:

David F. Gray
Department of Physics and Astronomy
University of Western Ontario
London, Ontario N6A 3K7
Canada

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.

Sources:

Robert Corell
National Science Foundation
4201 Wilson Boulevard
Arlington, VA 22230

Gerta Keller
Department of Paleontology
Princeton University
Princeton, NJ 08544

Richard Norris
Department of Geology and Geophysics
Woods Hole Oceanographic Institute
MS-23
Woods Hole, MA 02543-1541

Virgil Sharpton
Lunar and Planetary Institute
3600 Bay Area Boulevard
Houston, Texas 77058

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.

Sources:

Hartmut Thieme
Niedersachsisches Landesverwaltungsamt
Institut fur Denkmalpflege
Scharnhorstrstrasse 1
30175 Hanover
Germany

Robin Dennell
Department of Prehistory and Archaeology
University of Sheffield
Northgate House
West Street
Sheffield S1 4ET
England

Mark B. Roberts
Field Archaeology Unit
Institute of Archaeology
University College London
London WC1H 0PY
England

Christopher B. Stringer
Department of Paleontology
Natural History Museum
London SW7 5BD
England

Clockwork sex of coral reef algae

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

Sources:

Kenneth E. Clifton
University of California
Santa Cruz, CA 95064

Mark Hay
University of North Carolina
Institute of Marine Sciences
Morehead City, NC 28557

Research Notes:

Biochemistry:

Paternal smokers' cancer legacy

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

Sources:

Bu-Tian Ji
National Institutes of Health
Executive Plaza North
Room 431
Bethesda, MD 20852-7368

Vitamin E helps—but don't overdose

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

Katrina M. Brown
Rowett Research Institute
Greenburn Road
Bucksburn
Aberdeen AB2 9SB Scotland
United Kingdom
E-mail: kmb@rri.sari.ac.uk

Physics:

Satellite makes solar wind count

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

Sources:

Antoinette B. Galvin
University of Maryland
Physics Department
Space Physics Group
College Park, MD 20742
E-mail: galvin@umtof.umd.edu
Website: http://umtof.umd.edu/pub/

Atoms as the smallest quantum bits

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

Sources:

Neil A. Gershenfeld
Physics and Media Group
MIT Media Lab
Cambridge, MA 02139

Christopher Monroe
National Institute of Standards and Technology
Boulder, CO 80303
E-mail: monroe@boulder.nist.gov
Website: http://www.nist.gov