Earth science concentrates on investigating how the planet works and why. This field delves into the many layers of the Earth and explains how those pieces fit together into a cohesive structure.

NASA has a network of telescopes used to track near-Earth asteroids, like the recently spotted 2024 ... that now comprise NASA's Deep Space Network. Photograph by NASA/Science Photo Library Asteroids ...

All this happened about 4.5 billion years after Earth formed, with innumerable steps ... of the study published on Friday in the journal Science Advances, opens new tab. Physicist Brandon Carter ...