#xkcd 3037

[todays-xkcd]

A good ²³⁸Umbrella policy should cover it.

Radon [Explained]

Transcript Under the Cut

[Cueball is on the left, and is approached by Ponytail, who is reading a Geiger counter in her hand and is holding a toolbox in her other hand.] Ponytail: Radon levels in your basement are pretty high. Ponytail: When was the planet under this home built?

[Ponytail stops walking and lowers the Geiger counter] Cueball: Uhh, about 4½ billion years ago, I think? Ponytail: Oof. I was afraid of that. Ponytail: This planet was contaminated with uranium it formed. You really should have let it fully decay before building. Ponytail: Wait another 100 billion years and these rocks will be fine.

[Zoom in on Cueball's head] Cueball: But the Sun will burn out in 5 billion years. Ponytail: Yikes, you built around a short-lived yellow star? What a mess. Ponytail: Hope you have good insurance.