After examining dozens of Ice Age cave sites across Europe, paleo-archaeologist Genevieve von Petzinger found our ancestors used a small group of signs in common. Here, she walks us through her eye-opening discoveries and their implications.

African American writer Rich Benjamin spent two years living in — and writing about — America’s whitest neighborhoods. The response to his book (and TED Talk) was honest, raw — and sometimes misunderstood his purpose. Here, he responds to the response.

Funeral practices are deeply ingrained in culture and reflect beliefs and values. Here, take a look at just a few interesting funeral traditions from around the world.