Does Monkeys' immune Response hold the key to HIV?

What research into how primates deal with SIV (simian immunodeficiency virus) might teach us about HIV (human immunodeficiency virus). Artificial muscles could soon make a bionic man a reality. How scientists have weighed the biggest object in the universe, a black hole at the centre of a distant quasar. The role of the neurotransmitter dopamine in learning in situations were there is a possible reward involved.