Identify innovative solutions for collecting, sorting, storing, and transporting spent lithium-ion batteries.

Creating a healthier world by quantifying the benefits and harm of every bite of food you take.

Compete for a Chance to Win up to 100K by Designing and Pitching the next XPRIZE in 1 of our 5 Grand Challenge Areas

A multi-prize challenge to engage "ambassadors" in selling passes to ideacity; supporting North America's premier "meeting of the minds".

For centuries, we have been trying to solve the problem of abundance of food for every human-being alive.The time has come to nourish all.

Help astronauts go back to the Moon in 2024! NASA seeks new designs for a toilet that will work both in microgravity and lunar gravity.

ALL types of plastic in ONE bin everywhere on the PLANET Connection of local solutions on a global scale

Help us end the global pandemic of addiction. Pitch a technology that identifies the earliest bio and neuro signals of relapse in-real time

Autism Speaks is offering $150,000 in prizes for belief-busting breakthroughs in housing and residential supports for adults with autism.

What will higher education look like in 2049? Share your vision through science fiction.