Enbridge 'disappointed' as environmental review for Line 5 tunnel extended

An aboveground section of Enbridge's Line 5 at the Mackinaw City, Mich., pump station is photographed in October 2016. The company said the environment review of its proposed Great Lakes tunnel project has been pushed back to spring 2025. (File) An aboveground section of Enbridge's Line 5 at the Mackinaw City, Mich., pump station is photographed in October 2016. The company said the environment review of its proposed Great Lakes tunnel project has been pushed back to spring 2025. (File)

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How the lack of gravity in space impacts astronauts’ brain

What happens to the brain when you take gravity away? According to a new study looking at astronauts both before and after space travel, that experience causes physical changes that researchers believe requires at least three years between longer missions to recover from.