A little light healing

 作者:覃獾郎     |      日期:2019-03-07 06:13:18
By Joanna Marchant WHY do deep-sea bacteria glow? Scientists in Poland say they’ve cracked this long-standing biological mystery: the bacteria shine, it seems, to repair their DNA after it has been damaged by ultraviolet radiation that penetrates deep into the ocean. Many species of marine bacteria produce light, a phenomenon known as bioluminescence. But the process takes a lot of energy, and it is unclear what they get in return. “Bioluminescence takes up several per cent of the cell’s energy,