The monarch’s stupendous migration, dissected

The feisty orange-black butterfly uses a toolbox of biological tricks to find its way down to Mexico for winter and flap north again in spring. Here’s how scientists figured out those tricks — and what they don’t yet understand.

Centuries of pondering — and squabbling about — trees

Do forests warm or cool the Earth? What’s their effect on global climate change? A comic narrated by polymath Benjamin Franklin describes the evolution of thought on this issue and what we still don’t know.

Unpersuasive: Why arguing about climate change often doesn't work

In the US, where political parties have increasingly staked claims on one side of the issue or the other, beliefs may be more about belonging than facts