Jeff Bezos founded his spaceflight company two decades ago, at the turn of the millennium. You may not have known that, because Blue Origin spent years developing its rocket technology in secret. But by now you’ve probably heard, because Bezos wants everyone to know: Blue Origin is sending passengers to space, and he’s going on the inaugural trip himself.

Democrats did not like the Fifteenth Amendment.In the late 1860s, as Congress debated the proposal to bar disenfranchisement on the basis of “race, color, or previous condition of servitude,” Democratic senators and representatives charged Republicans with imposing a vile despotism on the southern states by enfranchising Black men.

Carl Schoonover and Andrew Fink are confused. As neuroscientists, they know that the brain must be flexible but not too flexible. It must rewire itself in the face of new experiences, but must also consistently represent the features of the external world. How? The relatively simple explanation found in neuroscience textbooks is that specific groups of neurons reliably fire when their owner smells a rose, sees a sunset, or hears a bell.

This article contains mild spoilers for the first two episodes of Loki.For 13 years, the Marvel Cinematic Universe built up the Infinity Stones as objects of grand power, capable of manipulating all existence when united. In Avengers: Infinity War, they turned half of the cosmos to dust; in Avengers: Endgame, the surviving heroes chased them down across time. In Loki, the Disney+ series released today, they’re nothing more than colorful paperweights.