Saturday Citations: M87* lashes out; a deep sleep discovery; proposal to build a digital cell

I love it when researchers observe an extra-weird particle, and this week, scientists reported the observation of a particle that only has mass when it's moving in a single direction. Good enough! An ancient DNA analysis suggests that Neanderthals and Homo sapiens interbred for about 7,000 years. And a new paper characterized the timeless awareness reported by people in states of deep meditation. Plus: A possible explanation for memory consolidation during sleep, a massive outburst from a famous, photogenic black hole and a proposal to BUILD THE MATRIX (for a single cell):