Supercritical CO2 is used to extract caffeine from coffee, but this strange phase of carbon dioxide is really weird ~science physics Video 17:20 15 votes
Researchers are trying to unravel the mystery of snow that falls but never shows up in the Colorado river ~enviro Article 1183 words, published Jul 21 2023 13 votes
Why did the US military dig a tunnel in the Alaskan tundra? What is the tunnel used for now? ~enviro climate change Video 17:09 5 votes