Science

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.
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.
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.
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.