Scientists cannot explain why both the quality and quantity of sperm have been dropping since the 1940s. Indications are pollutants may be responsible.

US scientists postulate the Barosaurus needed more than one heart to pump blood throughout its 15 metre height

A molecular theory is being put forward to explain why water behaves the way it does, but proof still eludes the researchers.

Meteorologists can now use satellite pictures to keep track of hot spots in the Pacific.

A LABORATORY set up by the Tata Institute of Fundamental Research deep in the Kolar gold field mines to study proton decay may be wound up because poor gold yields have forced closure of the mines.

CORAL reefs in various parts of the world are getting bleached and scientists are debating whether this is an early warning of global warming, or simply a local warming of sea waters. Tom Goreau

Environment ministry guidelines state that many of the adverse impacts of thermal plants can be foreseen and minimised through judicious siting, preventive and control

SOUND waves can be used to measure factory emissions, say scientists at the Open University in UK. Pollution monitoring systems using light waves are often inadequate and direct sampling of air

Chromosome III in yeast, the first to have its DNA fully described, opened up a wealth of new genes whose functions are completely unknown

Only one per cent of the world's bacteria -- those that can be cultured in the lab -- are known, but molecular techniques pioneered by the Agricultural and Food Research Council (AFRC) in Britain