Ex Africa semper aliquid novi. Attributed to various luminaries of antiquity, that saying (the probable inspiration for Isak Dinesen’s poem “Ex Africa,” itself the probable inspiration for her memoir Out of Africa, which in turn was loosely adapted into Sydney Pollack’s Oscar-lavished film) translates to “Out of Africa, always something new.” But it’s perhaps more notable that out of Africa came something quite old indeed: humankind itself, which over the past 60,000 years has been spreading ever farther across the world.