Tweeted By @TimHarford
A "steep learning curve" is the best kind of learning curve: it means you're learning fast.
— Tim Harford (@TimHarford) June 6, 2021
And when what you're learning to do is make things such as batteries, you get the kind of invention that quietly revolutionises the world.https://t.co/mWgm7FVQW2 pic.twitter.com/WD0HndAQzr