Astronomers discover the oldest quasar; Obtaining a person's age from saliva; Old species of plankton turns up in the Atlantic; Tanzanian government's U-turn; Trying to save the Tasmanians devil Show more
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Astronomers discover the oldest quasar; Obtaining a person's age from saliva; Old species of plankton turns up in the Atlantic; Tanzanian government's U-turn; Trying to save the Tasmanians devil Show more