Imagine that you are an astronomer on a world with one moon. It is always night on your world, and the moon is the only body in the sky.
Here’s another “incredibly fortunate” thing about the Cambrian explosion and about evolution generally.
According to Halsmer, engineering involves “the creative use of resources and ingenuity to accomplish a purpose or solve a problem.” It does so by creating “affordances.”
Today we celebrate the hundredth anniversary of the solar eclipse that, on May 29, 1919, physicist Arthur Eddington observed, seeking to test the General Theory of Relativity.
The ground under your feet is literally moving. The continents are drifting apart near an average rate of one inch per year.