Some readers might think the answer to this question is so obvious that maybe we’re offering it as a kind of joke—but it’s no joke. A growing number of people seem to actually believe the earth is flat, a view that a few NBA stars recently voiced.^1,2 Do we know the earth is round, and does it matter?

Nodosaurs were tank-like dinosaurs, similar to ankylosaurs, covered with spiky scales and a pair of two-foot-long spikes—one protruding from each shoulder. Miner Sawn Funk encountered one during 2011 in Alberta’s Millennium Mine. The fossil turned out to be the best of its kind.

Unlike animals, we communicate all kinds of information with our eyes. One subtle glance might express doubt and another joy, all without a word. How did we get this way?