Just like love, space can be hard on the heart

Ah, Valentine’s Day — a holiday that can certainly take its toll on the human heart. But there’s some small solace for those whose hearts are aching instead of humming today: at least you’re not in space.
Just like love, space isn’t very kind to the heart. In fact, the organ actually changes shape after being in microgravity for a long time. On Earth, the heart hangs in the chest and takes on a somewhat oblong shape because it’s constantly pulled down by grav