Odd that we select the heads of agencies by who is most qualified. But we select Presidents by whose personality we like best

— Neil deGrasse Tyson (@neiltyson) August 10, 2015

[And also, just because I love this:]

If you removed all the arteries, veins, & capillaries from a person's body, and tied them end-to-end, the person will die.

— Neil deGrasse Tyson (@neiltyson) May 8, 2015