On Climate Change: "But the climate has changed before!"
A graphic for visualization (courtesy of xkcd): The Timeline of Earth's Average Temperature (Since the Last Ice Age Glaciation). It's true that it's warmed before, but
image permalink: xkcd
A graphic for visualization (courtesy of xkcd): The Timeline of Earth's Average Temperature (Since the Last Ice Age Glaciation). It's true that it's warmed before, but
image permalink: xkcd