If you want to build your own Tardis, your own time machine, then this is the how-to video for you. Good luck when it comes to collecting the power from all those stars.
The South Pointing Chariot is a wonder of engineering from ancient China. Legend suggests it was invented by the Yellow Emperor arround 2600 BC (though it probably wasn’t!). The south pointing chariot has an arm which always points south. THis isn’t a compass. This is done entirely through gears, getting the radio and track right. […]
This video from the New Scientist shows a new type of airship that’s modelled on fish. I keep on wanting to call it an airfish. You see; it navigates by wriggling like a fish. This means it can do without the standard propulsion methods used by other airships and without them it is almost silent. […]