Dec 02 Watch 7:28 Why 2 degrees Celsius is climate change's magic number By PBS News Hour We hear all the time that we need to stop the planet from warming an additional two degrees Celsius above pre-industrial levels. Why is that specific number so important though? And what happens if we exceed that limit? William Brangham… Continue watching
Dec 02 Why the Paris talks won't prevent 2 degrees of global warming By Nsikan Akpan, William Brangham, Eric Osman Only one action could prevent the world from surpassing 2 degrees of global warming, but does this benchmark even matter?… Continue reading
Dec 02 Astronauts testify before Congress from space By Associated Press On his 249th consecutive day in space, astronaut Scott Kelly testified before the House Science, Space and Technology Committee. Kelly spoke about space debris, his relationship with the Russian cosmonauts accompanying him and what it's like to grow things on… Continue reading
Dec 01 Watch Is a home on the range the best way to reduce beef's carbon footprint? By PBS News Hour When it comes to global greenhouse gas emissions, livestock are one of the worst offenders. The cattle industry is trying to get a grip on how to reduce its carbon footprint, and some believe that getting animals away from feedlots… Continue watching
Dec 01 Watch 3:10 World leaders depart Paris, leaving negotiators to hash out climate accord By PBS News Hour Continue watching
Nov 30 Watch 8:33 How Paris is different from past climate change negotiations By PBS News Hour What do the nations that have gathered for the UN conference on climate change hope to accomplish this time around? Gwen Ifill learns more from Michael Levi of the Council on Foreign Relations and Seth Borenstein of the Associated Press. Continue watching
Nov 29 Bill Gates, Mark Zuckerberg launch international fund for clean energy tech By Melanie Saltzman, Nsikan Akpan Bill Gates, Mark Zuckerberg, the White House and global leaders have launched two international, multi-billion dollar funds to develop clean energy technologies. Continue reading
Nov 25 Watch 7:17 How Einstein's theory of relativity changed the world By PBS News Hour This week marks the 100th anniversary of the publication of papers laying out Albert Einstein’s theory of relativity. In honor of the anniversary, Gwen Ifill examines how Einstein changed our understanding of the cosmos with Einstein biographer Walter Isaacson. Continue watching
Nov 25 TVs, radar guns and other technologies linked to Einstein's theories of relativity By Nsikan Akpan If you’ve ever received a speeding ticket, you can thank Albert Einstein. Continue reading
Nov 25 Thanks to Einstein, my starships can break interstellar speed laws By Catherine Asaro Science fiction writer and scientist Catherine Asaro explains what might happen if you could travel faster than light and break Albert Einstein's theoretical speed limit for the universe. Continue reading