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Look up - a bunch of astronauts are about to float over Ireland
The International Space Station will be visable in our skies for the next five nights.
Your contributions will help us continue to deliver the stories that are important to you
The International Space Station will be visable in our skies for the next five nights.
That, and 8 other highlights from his Reddit AMA.
Life-giving chemicals have been discovered in isolated water believed to be 1.5 billion years old, raising hopes of scientists finding surviving microscopic organisms from a prehistoric age.