Creative Ways to Write Names in the Sand

NASA on Instagram: "What's it like to float through the International Space Station? For more than 25 years—since Nov. 2, 2000—humans have been living and working on the @ISS. More than 290 people from 26 countries have visited the station; their work and scientific research is helping us learn how to live in space (and prepare for missions to the Moon and Mars) while making life better back on Earth. As we celebrate this milestone, we've released a new 15-minute tour of the station; follow alon