SCIENTISTS say the increase in the atmospheric concentration of methane -- a major greenhouse gas -- is fast levelling off (New Scientist, Vol 140, No 1991). Evidence of a halt in methane rise

Scientists are trying to make designer solids substances whose molecules they assemble according to a predetermined plan

Computers and satellites will soon be used by transport authorities in USA and Europe to provide commuters a reprieve from traffic congestion

THE DAYS of the European corn borer, a notorious maize pest found in North America and Europe, seem numbered now that researchers have been able to inject into susceptible crops a gene

AIDS victims the world over are dismayed by the discovery that taking azidothymidine as soon as HIV infection is confirmed does not delay death any further than if they took it after symptoms develop.