This video from NASA shows a time-lapse of heart cells beating in the microgravity of the international space stating.
The cells – called cardiomyocytes – were derived from stem cells, which in turn came from skin cells.
NASA astronaut Kate Rubens used a microscope to keep a close eye on them before they were returned to Earth in August.
Results will show how cardiomyocytes change on a cellular and molecular level in space, improving understanding of microgravity’s negative effects for astronauts on long missions down the track.
