Discover how to build a simple DIY Stirling engine powered by heat from candles using an empty spray can and pen components.

Culture Secretary Lisa Nandy extols the merits of Press freedom – as long as it’s a state-blessed, self-improvement scheme ...

And yet, builders, hobbyists, and enthusiasts will take one look at a stock engine and ponder what sort of mad science they can apply. Just how much power could you possibly wring out of this lovingly ...