Scientists recently released time-lapse animation comparing Arctic sea ice since 1984 with now. The old sea ice -- the Arctic sea ice that lasts year after year -- is smaller than it has been in three decades.
Bill Nye to Climate Change Deniers: You Can’t Ignore Facts Forever - Bill Nye (The Science Guy!) explains that climate change deniers and other anti-scientists are entitled to their opinion. But that doesn't mean they get a seat at the table with the grown-ups. Bill is the CEO of the Planetary Society