Today is Asteroid Day — a reminder that 117 years ago, humanity got lucky. Asteroids are a real threat. It’s not 'if' they’ll hit, but 'when.' It is crucial to ensure continued funding and adequate resources for NASA’s Planetary Defense Coordination Office to track, analyze, and, if necessary, deflect near-Earth objects. Learn how The Planetary Society works to support planetary defense: https://www.planetary.org/sci-tech/neo-grants | The Planetary Society

The Tunguska event is the largest impact event on Earth in recorded history, though much larger impacts occurred in prehistoric times. Tunguska exploded five miles up in the atmosphere with the force of about a 15 megaton hydrogen bomb. As a result of that explosion, over 820 miles of old growth Taiga Forest was utterly obliterated. What are the takeaways for future actions as you think about this event? | Cosmic Summit