Helium is so special, and so rare, that the U.S. government once tried to buy it all up. And hide it. But the government's helium stockpile is running low. And we need it for MRI machines and NASA rockets.
Two highlights from our daily podcast, The Indicator, about houses. A plan to lower rents pits state against city, and a private firefighter breaks down his business for us. | Subscribe to our weekly newsletter here.