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At the parks and beaches of Rio de Janeiro on a Saturday, you're likely to find photographers clicking away at pregnant women with form-fitting outfits that highlight their bellies.

Hold out your hand for a century, and 100 million particles of dark matter will pass through each second without leaving a trace. Still, a physicist in South Dakota thinks he may be able to catch one.

Returns of toys and gadgets add up to more than $260 billion every year. Optoro, a startup in Maryland, tries to reduce the cost to retailers, and the cost to the environment.

The country artist's chart-topping new album, Something More Than Free, comes at a turning point in his life.

Iran is eager to have punitive financial measures removed and has been working to scale back its nuclear program much faster than many predicted, according to those monitoring the process.