It’s a Small World, After All

We’re All at the Mercy of the Microscopic

The Earth is pretty massive, right? It was a mystery how big until a Greek scholar named Eratosthenes devised an accurate method for estimating the circumference of our planet, around 240 BC. That’s clever for someone who lived more than 2200 years ago. Back then, the Earth must have seemed enormous, but as we have learned through the centuries, we occupy an insignificant amount of space compared to the solar system, the Milky Way galaxy, and the universe. The scale is astounding, and describing the humongous…