- Light powered rube goldberg machine
- Why there are wifi dead spots in your house.
- Security (or lack of) with android 9-dot mobile lock screen security
- Optimising the stability of elephant (and other objects) spinning tops
- ISSpresso: a coffee machine for the International Space Station
- Sculptures using glass lamminations
- Hex Clock
- An aquarium for computer viruses
Network | XKCD
19hertz 