Five Best Ideas of the Day: March 31

1. Is the sharing economy opening the door for big business to abuse contract workers?

By Jon Evans in TechCrunch

2. With fins off many menus, scientists see a glimmer of hope for sharks.

By Ted Williams in Yale Environment 360

3. The Houthi rebels in Yemen are following the ISIS playbook and crowdfunding their revolt online.

By Vladi Vovchuk in Vocativ

4. It might be possible to create a non-meat burger that helps the environment and improves your health. But will it taste good enough to win over the masses?

By Corby Kummer in MIT Technology Review

5. Medicaid may not be a slam dunk for physical health, but it yields huge returns in quality of life.

By the Mailman School of Public Health at Columbia University

The Aspen Institute is an educational and policy studies organization based in Washington, D.C.