4 'Genius Grant' Recipients from the MacArthur Foundation

1. John A. Ochsendorf, engineer and architectural historian who uses old technologies that go back to the Incas to improve today’s buildings.

2. Will Allen, urban farmer in Milwaukee, who delivers healthy food to poor city dwellers, and founded the nonprofit group Growing Power.

3. Chimamanda Ngozi Adichie, award-winning Nigerian writer whose most recent novel, "Half of a Yellow Sun," details the horrors following the Biafran civil war.

4. Nancy G. Siraisi, an historian of medicine focusing on the Renaissance.

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