Eric and Wendy Schmidt are backing a start-up-like approach to building a giant space telescope and powerful ground observatories.

© Schmidt Sciences

Eric and Wendy Schmidt are backing a start-up-like approach to building a giant space telescope and powerful ground observatories.

© Schmidt Sciences

As the war grinds on, sophisticated Russian defenses have pushed Ukraine to develop a frightening new weapon: semiautonomous killing machines.

© Finbarr O'Reilly for The New York Times