Jared Isaacman, an astronaut and high-school dropout-turned-billionaire, has been re-nominated by Trump to lead NASA.

Snack aisles in the 1970s were full of experiments. Food companies tried out new flavors, shapes, and packaging, often inspired by space travel or pop culture.

Toddler gut bacteria can influence curiosity and motivation in rats, revealing how early microbes may shape exploration and ...