Get your first two months of Skillshare for just 99 cents! http://skl.sh/secondthought9 How Long Does Humanity Have Left? – Second Thought We like to think that humanity will be around forever, but many scientists seem to think that might not be the case. so...how long do we have? SUBSCRIBE HERE: http://bit.ly/2nFsvTS WATCH LAST VIDEO HERE: https://www.youtube.com/playlist?list=PL6SJktA-ecJR_Fq2hhYVEFS11cf1YzG27 New video every Friday! Follow Second Thought on Social Media! Twitter: https://twitter.com/_SecondThought Facebook: https://facebook.com/secondthoughtchannel Reddit: https://reddit.com/r/SecondThought Support Second Thought on Patreon! https://patreon.com/secondthought Watch More Second Thought: Latest Uploads: https://www.youtube.com/playlist?list=PL6SJktA-ecJR_Fq2hhYVEFS11cf1YzG27 Spaaaaaace!: https://www.youtube.com/playlist?list=PL6SJktA-ecJQRpqT-hMTTFx8A6VVH3m6v What If...: https://www.youtube.com/playlist?list=PL6SJktA-ecJRI7VrWf_-mT0z6lrN--Cvi Popular Videos: https://www.youtube.com/playlist?list=PL6SJktA-ecJRx7ZaO9J04Kbob_u5baHxN About Second Thought: Second Thought is a channel devoted to the things in life worth thinking about! Science, history, politics, religion...basically everything you're not supposed to talk about at the dinner table. Welcome! If you're tired of learning after watching all my videos, come unwind on my gaming channel: https://www.youtube.com/channel/UCMvcO_t4lfDr34Dmm3NA5nw Business Email: secondthoughtchannel@gmail.com