Little Seeds that Split Great Rocks
In the warmth of a Canadian summer, in the reaches of a distant forest, a maple seed falls from the sky. This seed, called a samara, is a masterpiece of design that looks and behaves much like the blades of a tiny helicopter. As it falls through the air it spins, and this spinning action generates lift, and this lift keeps it aloft long enough to fall far from the smothering shade of its parent tree. As that seed helicopters …