Paul Wallich

Suggest Changes
Learn More
On school-day mornings, I walk my grade-schoolage son 400 meters down the hill to the bus stop. Last winter, I fantasized about sitting at my computer while a camera-equipped drone followed him(More)
The promise of 3-D printing is tantalizing: You envision something, draw it with the right software, and then print it in three dimensions regardless of how many parts it has, how they interlock, or(More)