The Prototypes [Free Robot Skins!] - Skins - Mapping and Modding - Minecraft Forum - Minecraft Forum
https://www.kickstarter.com/projects/1403065126/obsidian-3d-printer-high-quality-sleek-and-afforda? The 3Doodler pen is a rather fun toy. I say toy because while it's an extruder, it isn't capable of industrial-grade printing. However, it's cheap,
By Liz Ahlberg -Engineers at the University of Illinois at Urbana-Champaign demonstrated a class of walking “bio-bots” powered by muscle cells and controlled with electrical pulses, giving researchers unprecedented command over their function.