Welcome to Event Horizon, your weekly roundup of the best events in Minneapolis, St. Paul, and beyond.

"It's a reminder of how delicately balanced nature is." Researchers stunned by surprising trend in rare butterfly species: 'Highly unusual' first appeared on The Cool Down.

As U.S. butterfly populations face declines, the John Ball Zoo has launched a program to save these insects in a race against ...

The new species was observed spending “long periods sunning itself,” on a tree high up in Angola’s central highlands, according to a study.

At a news conference in Appleton Monday, elected officials and community members announced the third push to make the Monarch ...