1. You lay down a bunch of tubes in the desired shape (usually a ring or an oval works best for an ice rink, naturally).
The science behind it is complicated. Let’s just say that it helps keep the ice really, really cold (read a bit more here).
- Police in Athens used pepper spray on protesters two days ahead of Greece's major bailout vote.
- A medical helicopter has crashed in Colorado. Three people were injured, according to reports.