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- Cosmologists publish evidence that the expansion rate of the universe is increasing.
- Data sent from the Galileo space probe indicates that Jupiter's moon Europa has a liquid ocean under a thick crust of ice.
- NASA announces that the Clementine probe -orbiting the Moon- has found enough water in polar craters to support a human colony and rocket-fueling station.
- Earth's first medically successful hand transplantation is carried out by a team of surgeons in France.