California children sue US govt over pollution

Children in California are suing the US government over its failure to curb pollution, the latest in a series of legal actions by young people around the world worried about climate change.

Japanese experimental nuclear fusion reactor inaugurated

The world's biggest experimental nuclear fusion reactor in operation was inaugurated in Japan on Friday, a technology in its infancy but billed by some as the answer to humanity's future energy needs.

NASA to publish long-awaited UFO report

NASA is set to release on Thursday the findings of a long-awaited study on unexplained flying objects in Earth's skies.

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