New Scientist: Just a few days after 150 marine scientists signed a declaration to draw attention to rising ocean acidity – dubbed “global warming’s evil twin” — an international team has reported the first example of the potential for acid seas to directly affect animal behaviour. When exposed to acidity levels in water similar to those expected by the end of the century, clownfish larvae fail to correctly discriminate between the smells they use to find a reef, according to the new study led by …