What happened when humans and Neanderthals hooked up

The 2010 discovery that early humans and Neanderthals once encountered one another and had babies was a scientific bombshell that electrified the field of human origins.
Now, geneticists at the University of Pennsylvania say they have a better understanding of the nature of those prehistoric hookups, suggesting the trysts were mostly between male Neanderthals and female humans.
The intriguing finding, published Thursday in the journal Science, could help explain why the Neanderthal ancestry that is present in humans today is unevenly di