Usually, dumping fish-killing garbage into rivers is a human's job. But hippos seem to be doing it, too, through their routine mass pooping events.
Tagged With hypoxia
When taking high-resolution 3D scans of insects, scientists typically have to kill their test subjects, which isn't always ideal. By taking advantage of an insect's ability to survive oxygen-poor conditions, scientists have now used carbon dioxide to keep bugs in a state of suspended animation for upwards of seven hours at a time -- and with no apparent side effects.