cleaning

James Dyson with the DDM2:  Anthony Upton via the Telegraph

Though it may not be much comfort as you use it on the usual round of chores, inside the new Dyson DC31 vacuum cleaner is a motor that's ten times faster than a jet engine, and much quieter. At 104,000 rpm, the DC31's digital switched reluctance motor actually spins faster than any motor on earth.

Watching trashy TV late at night hardly provokes most people to think about laundry. Billy Mays seems to think that screaming about detergent will change that. But just what is that enthusiastic-to-the-point-of-belligerent pitchman yelling about? That would be OxiClean. On the commercial, Mays shouts that it uses the power of oxygen to miraculously clean. But does it actually work? The answer is sometimes, and knowing how it works explains why

Launch the slideshow to see how titanium oxide reacts with light to zap dirt at the molecular level

Not so long ago, chemical engineers discovered how to use titanium dioxide to keep buildings free of discoloring pollution.