Using DNA as his tool kit, he invented
a new way to make chemicals.
David Liu didn’t want his cats to be bored while he worked long days in the lab. So a few months ago, he did what any enterprising amateur inventor in his position would do: He whipped out his Lego set and built a motorized, heat-sensing, stuffed-mouse-flinging catapult to keep his kitties entertained. “They love it,” he says.
When Liu was still a graduate student at UC Berkeley, he had a different kind of tinkerer’s epiphany.