Using Einstein’s E=mc^2 negative energy is equivalent to negative mass Snoopy and Charlie Brown Woodstock in Santa hat popping in to say Christmas shirt and therefore the black hole’s mass decreases. The ‘real’ photons that escape were named ‘Hawking radiation’. This radiation has never been observed to date and unlikely to be in the near future, this is because the radiation would only be observed at the end of a black-holes existence. Once a black hole has consumed all of its surrounding matter, it would stop growing and due to the absorbing of particle-anti-particle it starts decreasing in size as it radiates. In cosmology there has been much recent research looking back to the early formation of the universe, where it was theorised that there would be much more evidence of anti-particles, coming into existence, as matter could be formed from a singularity with the evaporation of positive photons, creating mass, leaving the negative particle contained whithin a singularity.
First, it’s got a lot of rolling hills, with more mountain-like geography out west by the Appalachians. Dubuque was extremely hilly (as a part of the Driftless Region in the Midwest), but more of bluff-style hills; I would be in the flat downtown, then all the sudden be going up a street with 10–15% grade, then be on relatively flat ground again. In Illinois and Michigan, slopes higher than 2–5 percent are just not that common. When I first got here, I had such a hard time finding a route for runs that were not just up… then down… then up… then down! (I know for most people not from ridiculously flat areas, this really isn’t that notable, but it was literally the first thing that made a huge impression on me.) If you’re not somewhere that has been developed, 0–1% slopes are really hard to find! The closest I’ve found is the riparian buffers where a lot of stream valley trails are. Third, people here, particularly planners and scientists, love their streams. Without a lot of natural lakes, and with relatively high relief, fluvial (stream-related) activity is particularly important in shaping the landscape. So the people of Virginia have given streams the love they deserve. Streets and communities are named after streams; parks are named after streams and are situated in stream valleys, and a whole lot of research in the area deals with streams and watersheds.