Salt in water sources becoming worrisome in D.C. region, experts warn
THE INVENTION OF THE VACUUM CLEANER
Treasure trove of gold and jewels recovered from a 366-year-old shipwreck in the Bahamas
Does Hot Water Freezes faster?
"Cold water does not boil faster than hot water. The rate of heating of a liquid depends on the magnitude of the temperature difference between the liquid and its surroundings...