How supercomputers paved the way for laptops and chatbots
Enormous dimensions, complicated military calculations, and thousands of vacuum tubes—this was the early supercomputer.
NASA astronaut Don Pettit and National Geographic astrophotographer Babak Tafreshi compare stunning star trail photographs
Pettit made a name for himself as an astrophotographer after sharing his image 'Lightning Bugs' in 2012 showing beautiful star trails ...