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"Tell the chef, the beer is on me."
We’re used to radiation being invisible. With a Geiger counter, it gets turned into audible clicks. What you see above, though, is radiation’s effects made visible in a cloud chamber. In the center hangs a chunk of radioactive uranium, spitting out alpha and beta particles. The chamber also has a reservoir of alcohol and a floor cooled to -40 degrees Celsius. This generates a supersaturated cloud of alcohol vapor. When the uranium spits out a particle, it zips through the vapor, colliding with atoms and ionizing them. Those now-charged ions serve as nuclei for the vapor, which condenses into droplets that reveal the path of the particle. The characteristics of the trails are distinct to the type of decay particle that created them. In fact, both the positron and muon were first discovered in cloud chambers! (Image credit: Cloudylabs, source)
Mount Roraima, South America: This tabletop mountain is one of the oldest mountains on Earth, dating back two billion years when the land was lifted high above the ground by tectonic activity. The sides of the mountain are sheer vertical cliffs, with several waterfalls, making it nearly impossible to climb.
"Tell the chef, the beer is on me."
"Basically the price of a night on the town!"
"I'd love to help kickstart continued development! And 0 EUR/month really does make fiscal sense too... maybe I'll even get a shirt?" (there will be limited edition shirts for two and other goodies for each supporter as soon as we sold the 200)