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May 20 2005 | Views 556 | Comments (0) Leave a Comment

Hard Hats

Construction workers hard hats were first invented and used in the building of the Hoover Dam in 1933.

Hoover Dam

The Hoover Dam was built to last 2,000 years. The concrete in it will not even be fully cured for another 500 years.

Limelight

Limelight was how we lit the stage before electricity was invented. Basically, illumination was produced by heating blocks of lime until they glowed.

Mobile (Cellular) Phones

As much as 80% of microwaves from mobile phones are absorbed by your head.

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Bharat Nerkar