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Scientists in Mali and the USA discover a test to tell if a population of malaria parasite plasmodium is chloroquine-resistant and why this is important. There are now thought to be three kinds of invisible (to us) dark matter that together make up 95% of the universe. The engineering project to prevent poison gas leaking from the volcanic lake Lake Nyos in Cameroon. Why NASA is involved in designing a probe to investigate Lake Vostok under the Antarctic ice.