remembrance of things past National Museum of American History wants your tales of 2020 for a time capsule Clive Thompson
temporal anomalies A great interactive visualization of the weird ways that we perceive time Thom Dunn
programmers What is a nanosecond anyway? Computing pioneer Grace Hopper shows us (1983) David Pescovitz
causality Can the future influence the past? The scientific case for quantum retrocausality Andrea James