Now scientists in the US have found that the cells of monkeys and rats which have been damaged by "Ecstasy" regrow abnormally,"New Scientist reported. "Ecstasy" is popular among young adults and teenagers at "raves" - huge,all night dance parties.They claimed the drug makes them less inhibited. They researchers admit that the amounts of "Ecstasy" given to the animals were high. However,they said it was possible that people taking several doses over a weekend could be affected as much as the animals in the experiment.