It is always cool to repeat classic experiments. How many of us know the radius of the Earth because we determined it on our own? I haven't done this, at least not yet. For all my life I have just ...

Astronomers may be ready to explain our universe's lack of exoplanets twice the radius of Earth. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works.

The faraway exoplanet could help provide answers as to why there are hardly any planets with twice the diameter of Earth. When you purchase through links on our site, we may earn an affiliate ...