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Miniature working human heart grown in petri dish

Scientists from the University of Pittsburgh School of Medicine have successfully grown a working heart in a petri dish using the frame of a mouse’s heart and adult human skin cells, reverted back into their basic stem cell state. The heart works fully but beats at only half the speed of a full human heart — as well as obviously being too small. However, the breakthrough is the latest in a long line of developments which could revolutionise organ transplants.

The QWERTY Keyboard

Although the keys on the original typewriter keyboard were alphabetized, consumers quickly realized the swift taps of typists would inevitably jam the machine

Beautiful nature tattoos (49 pictures)

Colourful nature tattoos projecting the most serene and colourful scenes. These tattoos are so beautifully rendered that you can practically hear the birds chirping and the leaves rustling.