In more environmental news, carbon levels in the atmosphere registered 415 parts per million over the weekend—a level that has not been seen in over 3 million years. The reading was observed at an observatory in Hawaii and is the latest indicator of the fast-growing threat of atmospheric carbon concentration driving climate change. Meteorologist Eric Holthaus tweeted, “Not just in recorded history, not just since the invention of agriculture 10,000 years ago. Since before modern humans existed millions of years ago. We don’t know a planet like this.”