Dear Thinkers,

The earth orbits the sun at about 67,000 miles per hour. Imagine cruising down I-70 when traffic isn’t too bad. Now go 1,000 times faster. That’s how fast we’re traveling around the sun. And we don’t even know it.

For most of human history, we assumed we sat in one place and the heavens whirled around us. And the idea that we too are whirling around space at breakneck speeds and only kept in place by forces that we don’t fully understand is scary. No wonder they locked Galileo up!

But our five senses can’t tell us everything that’s going on, especially when we’re thinking about things really big and really small. So we have to use that 3 pound lump protected by seven millimeters of skull.

Sincerely,

Mr. Heimbuck