Quantum dots are crystals of a fluorescent semiconductor material with a diameter of as few as 10 to 100 atoms (2-10 nm). They are used as labels for imaging molecules because of their very narrow ...

While long-term memory can store a huge amount of information, the amount of details contained for ready usage in working memory is thought to be relatively limited. There are differing models of ...

You can play the daily Jumble, the Jumble in Color, and its several variations on the Chicago Tribune website. Players can also print them and play on paper if they miss doing newspaper puzzles ...