30 million years ahead - how the butterfly beat technology to it

Physics /

Nov 19, 2005 | 4.4 / 5 (18) | 0

Butterflies have evolved a unique mechanism to create a dazzling display of colour which puts physicists in the shade. Modern light emitting devices have traditionally been inefficient because most of the ...

Review: Biometrics Technologies Measure Up (Part 2/3)

Electronics /

Nov 19, 2005 | 3.6 / 5 (10) | 0

(Part 2/3) (Part 1) Biometrics technologies have come a long way from a slow start in the early 80s. Now they can be found almost anywhere and soon, almost everywhere. ...