Study: Microgravity Leads to Irregular Heartbeats in Space

A few years ago, biomedical scientist Jonathan Tsui flew to Florida with unique baggage. He toted compact chambers—smaller than a cell phone—containing 48 bits of human heart tissue. Tsui brought the samples to NASA’s Kennedy Space Center, where in March 2020 they were loaded onto a SpaceX craft and sent to the International Space Station for a month. The goal? To study the effects of low gravity conditions on the human heart in preparation for long-term space travel.