1.   And because UV-A rays penetrate more deeply than UV-B, they cause weakened and leaky blood vessels, they add.

2.   At that moment, a ray of light penetrated the darkness inside McCarron, and the tears poured out as an expression of honor to his mother.

3.   The barrier-type sunblocks include zinc oxide and titanium dioxide that reflect or scatter ultraviolet rays before the rays can penetrate the barricade and burn the skin.

4.   The UV-A rays penetrate more deeply and do more damage to underlying connective tissue.

5.   There is convincing proof that the uranium metal in unexploded weapons presents no danger, the radiation level is low and the rays do not penetrate skin.

6.   As the first rays of light penetrated the sky on Sunday morning, the children added the finishing touches to their works of art.