Metals in Orbit
October 24, 1998 | Volume 154 | Number 17
Cover: The space shuttle Columbia has carried several experiments designed to show how materials behave in microgravity. What scientists learn might improve metal processing on Earth.
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News of the Week:
Bright Lights Dim Winter Depression
New research supports light therapy as an effective treatment for severe mental depression that recurs during winter months.
Bigger U.S. population uses less water
Despite a growing population, the United States is now saving 38 billion gallons of water a day compared to the all-time-high consumption 18 years ago.
Chlamydia bacterium yields surprise genome
Scientists have deciphered all the genes of the bacterium that causes chlamydia, the most common sexually transmitted bacterial disease in the United States; solved some mysteries about the pathogen; and opened new avenues for research.
Making use of mismatched donor marrow
A new bone-marrow transplant method offers greater success in leukemia patients who must receive mismatched donor marrow.
Cell-phone muffler squelches street noise
Newly developed noise-canceling technology may soon help cell-phone users hear the voice at the other end despite noisy cars, airports, and streets.
Clues hint how particulates harm lungs
By eavesdropping on the chemical chatter within lung cells exposed to particulate pollution, researchers have identified intracellular messages that may trigger disease.
Fish nature: Sometimes shy, sometimes bold
Tests of pumpkinseed sunfish show that shyness and boldness are personality traits not necessarily expressed in all situations.
DNA computing tricks add up to progress
By biochemically manipulating DNA strands attached to a gold surface, researchers have performed two more DNA computing operations similar to those executed by a conventional computer.
Giant iceberg breaks off
An iceberg bigger than Delaware has split off from the Antarctic ice shelf, but global warming is probably not to blame.
New penicillin booby-traps bacteria
A modified form of penicillin can potentially kill bacteria resistant to antibiotics, using the very enzyme that can disable the drug.
A new angle on a blood-cell hormone
The three-dimensional arrangement of two cell-surface molecules with erythroprotein (EPO), which stimulates production of red blood cells, explains why EPO mimics dont work as well as the real thing.
How smoke makes a wildflower grow
At least 25 kinds of plants in the California chaparral need wildfire smoke to trigger sprouting, though other factors matter too.
Look out, here comes that scrawny guy
A tropical butterfly species provides a rare example of small males having the advantage over bigger guys in territorial disputes.
Can iguanas ride rafts for 200 miles?
Iguanas that washed ashore on debris from a storm probably traveled more than 200 miles between Caribbean islands, the best evidence yet that animal species could have spread by rafting.
Spring-loaded corridor connects oceans
A surprising string of seafloor hot springs in the Indian Ocean may be the stepping stones for animals moving from the Pacific Ocean to the Atlantic.
Revived cable sparks seafloor research
Scientists revived a lifeless submarine telephone cable that now connects them to experiments at the bottom of the Pacific Ocean.
Brighter bulbs light up cell innards
Cell interiors light up brighter and longer when tagged with fluorescent markers made from quantum dotsclusters of semiconductor atoms with special light-emitting properties.
Crystal bends light hard, saves space
A miniature device that can bend light sharply but keeps it bright, represents a potential path to faster telecommunications switching.
Freed from gravity, metals reveal their mysteries
Taking advantage of low-gravity experiments aboard NASA's space shuttle, researchers are starting to sort out confounding factors that determine how metals mix and solidify.
Atom Tinkerers Paradise
Innovations to atom-imaging microscopes create labs on tips
The scanning probe microscopes that lifted the veil on the atomic and molecular world in the 1980s have become "laboratories on a tip," offering novel platforms for manipulating matter.
Letters: A Selection from Letters to the Editor
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