Genome analysts at 23andMe have devised a new way to reveal the secrets inside your DNA. Their latest test will reveal how many of your genes come from Neanderthals. Be warned: some people have a lot of Neanderthal in them.
We know that as ancient humans expanded into Eurasia, they began interbreeding with our Neanderthal cousins. But it now appears that the fun didn't start there - our ancestors also reproduced with precursors like Homo erectus and Homo habilis.
Late last year, we learned that early humans and Neanderthals once shared Eurasia with a third hominin group, known as Denisovans. Now, the new discovery of a Denisovan toe bone might indicate that these three hominin groups were pretty much constantly interbreeding.