Smartphones, skyscrapers, spacecraft. Modern technology seems mind-bogglingly complex. But beneath the surface, it can be beautifully simple. In Nuts and Bolts, award-winning engineer and broadcaster Roma Agrawal deconstructs our most complex feats of engineering into seven fundamental inventions: the nail, spring, wheel, lens, magnet, string and pump.
Everybody wants breathable air, a healthy population, civil and consensual politics. We want a peaceful world, a stable economy. We've always wanted these things. The fundamental point of politics is to deliver them. And yet clearly our political systems are failing. Why is it so hard to get - and keep - the world that we want? The answer is that politics produces a number of traps: democracy, equality, solidarity, security and prosperity.