These swimmers are sure to sink. Human sperm can get lost in space, new research shows. Scientists put sperm to the test to determine whether a child could be conceived in space, using a tiny plastic “obstacle course.” The findings, published in the journal Communications Biology , showed that the navigational abilities of sperm are negatively impacted by a lack of gravity, and having a baby in space may require “a bit more direction.” While previous studies have looked at sperm’s ability to