Why Are We the Only Human Species Left? What happened to others...

45,000 BC. You're on a ridge in Europe, looking down at a campfire that isn't yours. The people around it are human — just not your kind of human. Back then, that was completely normal. You could walk for a month and meet three or four different species of human. Today there's just one. You. At least 21 human species have existed. At least 9 were alive at the same time, 300,000 years ago. Every single one of them is gone except us — and it wasn't because we were the strongest, or the biggest-brained. Some of them beat us on both counts. This video covers the real story: a 3-foot-6 human who hunted dwarf elephants next to Komodo dragons, a hybrid girl whose mother was a Neanderthal and father was a Denisovan, a population crash that nearly erased our own species down to about 1,280 people — and the twist almost no other video on this topic tells you: they didn't all die out. Some of them are still alive, right now, inside your DNA. No single reason explains why we're the last ones standing. It's a stack of small advantages, a near-extinction event, a lot of luck, and one discovery that completely changes what "extinct" even means. 🔔 Subscribe for more of the strangest, most surprising true stories in human history.