Dear Thinkers,

When you were babies and didn’t yet know the names for things, you could still put them in piles by their similarities. That’s because we know things by their properties. As we get older and more informed, we start to know things by their invisible properties.

Today in science we’ll continue to talk about substances by their invisible properties. Today it’s density.

Science reminds us of what poets have been telling us for centuries: there’s more than appears on the surface; the most important stuff is what we can’t see, touch, or hear. But if we tune ourselves in, if have a method, we can uncover the hidden truths.

Sincerely,

Mr. Heimbuck