Please consider donating to Behind the Black, by giving either a one-time contribution or a regular subscription, as outlined in the tip jar to the right. Your support will allow me to continue covering science and culture as I have for the past twenty years, independent and free from any outside influence.
Scientists have discovered a Kuiper Belt asteroid lighter than water.
Nor is the asteroid small, having a 400 mile diameter. It is thought is is made up mostly of ice, is not very densely packed, and is probably quite porous as well.