Blood Typing Only you can save the patient now so concentrate and administer the correct blood type.
Finite Universe? Recent scientific hypotheses imply that the universe may not be infinite, as was believed previously.
History of the Scroll Lock Don't be afraid to touch the Scroll Lock key. Nothing bad will happen in fact, probably nothing at all will happen. Once upon a time, however, something did.
Password Security Enter a password, click submit and this site will score it against best practices.
Life Case Bag to bullet-proof vest in seconds. Each Life Case incorporates two, multi-layered, ballistic-resistant Kevlar panels.
Sci-Fi Book Covers Book covers and movie posters, mostly from the '50s and '60s. Some are from science fiction movies such as Blade Runner and Metropolis. Others are from books. They are all real.
Ferrofluid Videos The ferrofluid you see consists of magnetic nanoparticles suspended in water. As a magnet is brought up to the ferrofluid, spikes form in the fluid and can dance in response to movements of the magnet.
People Sorter How easy is it to group people into races based on appearance? What about using individual traits? Does everybody classify the same way?
