Observations support the hypothesis that thousands of comets are present in a belt on the periphery of our Solar System

A retinal implant based on a microchip could help treat blindness

Texas A&M University researchers have reported finding DNA traces in the pigment used in 3,000-4,000 year old cave paintings discovered in Texas (Science, Vol 268, No 5210). Paint samples

Keeping the standard kilogram - a 4 cm high and 4 cm wide platinum iridium cylinder in Paris - clean is a formidable task. The cylinder has to be kept free from dust and contaminants like

Membranes with pores fine enough to filter molecules

Martin Cooper of the National Museums and Galleries on Merseyside in the UK has developed a laser technique to deans off the dirt from sculptures without damaging them (New Scientist, Vol

A cheap way to prepare films of highly porous solids which have diverse applications

The versatile computer has found a pew role - that of a therapist. In a study at Georgia Tech, psychologists have used virtual reality to treat a group of 10 people suffering from acrophobia - an

Scientists are now using lasers to control the optical properties of gases. This technique has applications in many areas including high- sensitivity microscopy and ultra sensitive magnetometers