Now , such life has all but disappeared , with the exception of the cypress , whose roots find water deep underground .
Rock paintings depict creatures such as giraffes and antelopes , suggesting that at one point there was enough vegetation to support them .
Such life has all but disappeared , with the exception of the cypress , whose roots find water deep underground .
Rock paintings depict creatures such as giraffes and antelopes , suggesting that at one point there was enough vegetation to support them .