One day, when he was still barely a teenager, the film director Steven Spielberg came to visit his father, Arnold, at work.

The return of passenger supersonic flight may have just picked up speed.

The return of passenger supersonic flight may have just picked up speed.

The return of passenger supersonic flight may have just picked up speed.

The return of passenger supersonic flight may have just picked up speed.

The return of passenger supersonic flight may have just picked up speed.

The return of passenger supersonic flight may have just picked up speed.

The return of passenger supersonic flight may have just picked up speed.

Brain cancer cells are being lured to their doom, artificial neural networks are functioning even more like human gray matter, and lab-grown chimpanzee “mini-brains” are enriching our understanding of human evolution.

Brain cancer cells are being lured to their doom, artificial neural networks are functioning even more like human gray matter, and lab-grown chimpanzee “mini-brains” are enriching our understanding of human evolution.