Explore
Challenges
For Business
For Startups
Who We Are
Results
Get Started
Launch a challenge
Connect with talented problem solvers
Solve a challenge
Join our community and win prizes
Log In
menu
log in
Explore Challenges
For Business
For Startups
Who We Are
Results
share
Follow
Following
Unfollow
message
Chih-hung Chang
Corvallis, Oregon, United States
more
About
Challenges
Following
Activity
Awards
Activity
About
Challenges
Following
Activity
Awards
Sept. 10, 2020, 10:56 p.m. PDT
Solar Prize Round 4
registered for challenge
