Light is 18 million times faster than rain -- The Hubble Telescope can't look at the sun -- Rainbows only show if the sun is behind you -- Your eyes see upside down -- The loudest sound ever was a volcano -- Dogs can hear things you can't -- Marshmallows melt at mach 1.6 -- A ramp is a machine -- A battery and a bungee jump both store energy -- A kettle boils faster on a mountaintop -- Snow keeps you warm -- A bird on a wire won't get a shock -- Electricity zaps back and forth -- Lightning strikes 100 times every second -- The Earth has two North Poles -- A ball thrown in space will never stop -- Skiers don't ski on snow -- A parachute has a hole in it -- Astronauts don't snore -- Neptune's summer lasts 40 Earth years -- The sun is losing weight -- Glossary.