“It's a natural cycle!” Some of the most common myths about climate change

This is hands down the most common “sciency-sounding” objection I hear to human-caused climate change:

“The climate’s changed before. It’s natural.”

And it’s true! Earth’s climate has changed in the past, thanks to cycles in the planet’s orbit around the sun. These natural patterns, called Milanković cycles, have driven ice ages and warm periods for milli…