An insect like a wasp or a water strider can rest atop the water, held up by surface tension. This means that the cohesive force of the water molecules sticking to each other is stronger than the force of the bug being pushed down by gravity. This works because it spreads its weight out over a large surface area (like snowshoes). That creates a slight indentation in the top of the water, changing the direction that the light coming down is refracted and re-directing it slightly sideways (that’s where the bright halos around the dark areas come from). And what’s the absence of light?
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This picture of a portrait is the first look at Tom Hanks in character as Walt Disney in the upcoming December movie ‘Saving Mr. Banks’. The film, which will be released December 20, 2013, tells the story of Disney’s 14-year effort to convince Mary Poppins author P.L. Travers to turn over the rights to her book. Emma Thompson plays Travers, and she’s been spotted by photographers, too.