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Shifting colors of an octopus may hint at a rich, nasty social life

Shifting colors of an octopus may hint at a rich, nasty social life

When the gloomy octopus of Australia turns dark and towers threateningly over his neighbor, he's likely signaling aggression, scientists now say. Neighbors get the message -- they turn pale and flee.

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MN tree researchers, foodies give American chestnut a second chance

MN tree researchers, foodies give American chestnut a second chance

A blight in the early 1900s wiped out the species, once known as the "Redwoods of the East." Now, a southern Minnesota farm is producing hybrid chestnut trees that survive winters and bear fruit.
by Elizabeth Baier

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Author Steven Johnson: Collaboration breeds innovation

Author Steven Johnson: Collaboration breeds innovation

Does innovation occur because one lone genius has an "ahah moment"? Or because somebody has a hunch and is dogged in pursuing it?

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Twitter goes down early Tuesday

Twitter goes down early Tuesday

The company hasn't provided details about what went wrong; some features such as search and direct messaging were still presenting problems Tuesday morning.

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Hunting snakes in the Everglades to protect native species

Hunting snakes in the Everglades to protect native species

Burmese pythons in the Everglades are taking a big toll on native wildlife. To combat their spread, the state is holding its second Python Challenge -- a hunt expected to draw over 1,000 participants.
by Greg Allen

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Why are no two snowflakes the same?

Why are no two snowflakes the same?

From a distance, snowflakes may all look the same, but they are not. In fact, there are lots of different shapes of snowflakes -- not just those classic star shapes you might try to replicate with paper cutouts.
by Molly Bloom

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How a little boy's cancer diagnosis inspired a haunting video game

How a little boy's cancer diagnosis inspired a haunting video game

Joel Green was just a baby when he was diagnosed with brain cancer. His dad, Ryan, used his skills as a video game developer to tell the story of the family's struggle with that dragon, cancer.
by Meredith Rizzo

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