'Forgotten' meteor caused mega-tsunami

A huge meteor which slammed into the southern Pacific Ocean about 2.5 million years ago generated tsunamis hundreds of meters high, and may have destablilized the entire planet's climate system.

'Perfect' transistor built from a single atom

Physicists have created a working transistor using only a single phosphorus atom placed precisely in a silicon crystal.

Water treatment plants may make water more toxic

Waste water treatment could actually be increasing the amount of some toxins, by transforming common pain-killing drugs into more dangerous forms.