31.   The idea that astral radiation caused mass extinctions is nothing new.

32.   The panel said a few preliminary studies have suggested radiation may cause subtle biological changes in the brain, but that does not mean health necessarily would be affected.

33.   Too much UV radiation can cause skin cancer and destroy tiny plants at the beginning of the food chain.

34.   This variability could mask the inherited genetic changes caused by radiation, he said.

35.   Too much UV radiation can cause skin cancer and destroy the tiny plants at the beginning of the food chain.

36.   Too much UV radiation can cause skin cancer and destroy tiny plants.

37.   The scientists do not rule out the possibility that radiation could cause hot-spots to occur somewhere in the worm that then affected cell processes.