Ancient Rome’s precision: In 398 BC, Romans dug a 1.2 km tunnel from both ends and met perfectly. No modern tools, just brilliant planning.
[🎞️ simple.history_]
Our Solar Experiments's kit for micro:bit is a great way of learning about renewable energy. But it works best when there is some sun! monkmakes.com/mb_solar.html
You can now buy our LED Arc from our friends at PiHut in the UK. Instructions, buy-links and datasheet here: monkmakes.com/led_arc.html Rings for use with @microbit_edu and pins for other boards.