A gigantic, weather-defining current system could be headed to collapse. Peter and Susanne Ditlevsen had a simple yet controversial question: How much time might we have left to save it?
Originally published in April 2020: Mechanical cooling revolutionized the global food supply—and accelerated global warming. Peter Dearman’s liquid air engine could change all that.
The European Commission is allocating €7.3 billion for defense research over the next seven years. From drones and tanks of the future to battleships and space intelligence, here's what it funds.