The oxygen formed ozone, shielding the sun's ultraviolet rays and allowing many classes of life to emerge in newly formed coastal shelves.
The Sun
Finally, ensure your sunglasses protect you from ultraviolet rays since this can harm the eyes.
Times,Sunday Times
It starts with the sun, the ultraviolet rays of which are captured by algae in the upper waters.
Times, Sunday Times
With the summer solstice only several weeks away, the power of the sunshine will be strong, with high levels of ultraviolet rays.
Times, Sunday Times
One puzzle was how the bacteria could survive the intense ultraviolet rays of the sunshine so high up in the atmosphere.
Times, Sunday Times