#xkcd 3053

[todays-xkcd]

Unfortunately, KM3NeT led to the discovery of the Pauli anglerfish, which emits Cherenkov radiation to prey on neutrino researchers.

KM3NeT [Explained]

Transcript Under the Cut

[Ponytail is presenting to Cueball and Megan on a drop down screen.] [On the screen is a side view of a deep-water telescope, attached to the bedrock, floating in the ocean. It looks like four series of circles stringed together from the ground.] Ponytail: The KM3NeT deep-water telescope detects the flashes of Cherenkov light from neutrino interactions. Cueball: How do you know you aren't just seeing bioluminescent fish? Ponytail: Cherenkov radiation is only emitted when things exceed the local speed of light, so it can't be produced by under-c life.