A group of scientists and nature lovers exploring tunnels in the Canary Islands became trapped underground and at least six of them died after apparently inhaling toxic gases, officials said Sunday. The group of 30 _ among them scientists from a renowned astrophysics observatory _ descended into the manmade tunnels Saturday. Several people appeared to have been struck unconscious by gases, said Jose Miguel Ruano, Tenerife regional government minister. Six people were pulled from the tunnel dead, and six other were taken to hospital by helicopter, Ruano said. Full Story