A few years ago, astronaut and science educator Don Pettit joined the crew of the International Space Station. All astronauts are allowed to bring a few personal items with them. Pettit chose to bring candy corn. He used...

But..there's nothing to cause the shadow! What's g...  ...water strider can rest atop the water, held up by surface tension . This means that the cohesive force of the water...  ...ks because it spreads its weight out over a large surface area (like snowshoes).That creates a slight inden...