When NASA astronaut Dr. Serena Auñón-Chancellor arrived on the International Space Station for her six-month stay in June 2018, she was in awe of the vast array of science experiments on board. Before they launch, astronauts are only trained on about 20% of the science they see on the station.

“I was stunned, in a good way, at the high quality of the science,” she told CNN. During her time on the space station, Auñón-Chancellor worked on hundreds of experiments across a variety of sciences, including biology, biotechnology, physical science and Earth science.
Read more from Ashley Strickland with CNN here.