In an episode of "Cosmos: A Spacetime Odyssey," astrophysicist Neil deGrasse Tyson debunked the claim made by Sen. Marco Rubio (R-FL) and Fox News commentators that since the "climate is always changing," there's no such thing as climate change caused by human activity. Tyson contrasted the natural climactic changes in the past with the unnatural changes occurring now. Watch:
TYSON: We just can't seem to stop burning up all those buried trees from way back in the carboniferous age, in the form of coal, and the remains of ancient plankton, in the form of oil and gas. If we could, we'd be home free climate wise. Instead, we're dumping carbon dioxide into the atmosphere at a rate the Earth hasn't seen since the great climate catastrophes of the past, the ones that led to mass extinctions. We just can't seem to break our addiction to the kinds of fuel that will bring back a climate last seen by the dinosaurs, a climate that will drown our coastal cities and wreak havoc on the environment and our ability to feed ourselves. All the while, the glorious sun pours immaculate free energy down upon us, more than we will ever need. Why can't we summon the ingenuity and courage of the generations that came before us? The dinosaurs never saw that asteroid coming. What's our excuse?