Dark matter is (probably) more complex than you think

Scientists typically believe that dark matter behaves in a simple way: if one clump encounters another, the two interact solely through gravity. However, researchers have published findings which suggest that there’s more involved. They’ve noticed dark matter (the blue lines in the photo above) lagging behind a galaxy due to friction, hinting that there are factors beyond gravity at work. […]

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Lead – It’s whats for dinner

Modern cooks could probably find their way around a Roman culina. The kitchens featured an oven of sorts and pots and pans made of metal. One major difference, however: Those utensils packed plenty of lead. Soft, flexible, and wonderfully ubiquitous, lead was used to make Roman pipes, coins, and wine jugs. It was even used in face powders and paints. […]

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The Hungry Planet

More than 850 million people around the world—one in nearly seven—don’t have enough to eat. Although current global food production is sufficient to feed everyone, the number eating less than the minimum the human body needs—an average 2,100 calories a day for adults—now grows by more than ten million a year, mostly in the poorest nations. Countries with unstable food […]

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