Open Sesame !!

You exit a busy store, point your key fob across the crowded parking lot, press a button and “Pop!” — your car door unlocks. How does the car know it’s you? And why don’t other cars open, too? (Read on)

Technology is going out of Hands..

Grey goo refers to a hypothetical end-of-the-world scenario involving molecular nanotechnology in which out-of-control self-replicating robots consume all living matter on Earth while building more of themselves...(Read on)

How do rewritable CDs work?

All CDs and DVDs work by virtue of marks on the disc that appear darker than the background. These are detected by shining a laser on them and measuring the reflected light...(Read on)