Half a year in space causes astronauts to lose bone permanently, equivalent to 10 years on Earth
new research suggests that long-duration space missions can have permanent effects on astronauts' health, particularly on their skeletal systems.
Tags : space mission
NASA postpones plan to return humans to the Moon by 2024
nasa originally planned to send humans to the moon by 2024. but this plan may have to be postponed due to difficulties in developing astronaut suits.