Neil deGrasse Tyson @neiltyson
@GelfandGenna @wef With our without climate change, the high gravity of gas giant planets empowers them to keep their large quantities of lighter gasses such as H2 and He. Smaller planets can only hold onto rarer, much larger molecules (O2, N2, H2O, CO2) bcause they don’t move as fast. — PolitiTweet.org
