It's the vitamin associated with the sun that we absorb through our skin, and increasingly block out when we use sunblock, to avoid getting skin cancer.

VOA: standard.2010.05.28

It started out as a nine ton block of ice.

VOA: standard.2009.12.13

Delegates in Spain hit a major stumbling block Tuesday when the African group pulled out of some climate talks, saying rich nations are not doing enough to tackle climate change.

VOA: standard.2009.11.04