Kamala Harris on Instagram: "I’m answering a few questions to bring you behind the scenes of working on my new book — including my favorite chapter to write. 107 Days is out September 23. I can't wait for you to read it."

Invention on Instagram: "In 2013, IBM scientists created A Boy and His Atom, the world’s smallest movie, by moving individual carbon monoxide molecules one at a time. Using a scanning tunneling microscope, which can magnify surfaces over 100 million times, they positioned 65 atoms to form shapes and patterns that came together as frames of a stop motion film. Each frame measured just 45 by 25 nanometers, so small that 1,000 frames could fit inside a single grain of salt. The achievement was reco