As if we don't already have enough to worry about, here's something else to add to the list space junk.
It's a real problem, as demonstrated in "Space Junk 3D," which opens Feb. 3 at the Clark Planetarium. In 38 minutes, this cool-looking film builds a case that we've mucked up space the way we've mucked up the Earth.
Turns out there are thousands of leftover rocket pieces and dead satellites (in addition to nearly a thousand working satellites) in orbit. That junk doesn't just fall back toward Earth and burn up. Those pieces of junk have started crashing into each other, creating more pieces.