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Stored inside your genome are clues to the history of humankind, including global migrations and population crashes, according to researchers who have analyzed DNA pioneer, Craig Venter's publicly published DNA sequence, and those of 6 others, to reveal major milestones in human history. The analysis suggests that descendants of the first humans to leave Africa shrunk to as few as 1,000 reproductively active individuals before rebounding. The study also suggests that, contrary to popular theories, these early humans continued to breed with sub-Saharan Africans until as recently as 20,000 years ago. Genetic researchers have traditionally compared DNA sequences from populations around the world to determine how populations relate to one another and when they might have branched off.
A journey through man's attempts at visualizing time itself I was recently asked to select my all-time favorite books for the lovely Ideal Bookshelf project by The Paris Review 's Thessaly la Force. Despite the near-impossible task of shrinking my boundless bibliophilia to a modest list of dozen or so titles, I was eventually able to do it, and the selection included Cartographies of Time: A History of the Timeline by Daniel Rosenberg and Anthony Grafton. Among both my 7 favorite books on maps and my 7 favorite books on time , this lavish collection of illustrated timelines traces the history of graphic representations of time in Europe and the United States from 1450 to the present, featuring everything from medieval manuscripts to websites to a chronological board game developed by Mark Twain. The first chapter, "Time in Print," provides some context for the images:
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There are many unsolved problems in mathematics. Some prominent outstanding unsolved problems (as well as some which are not necessarily so well known) include 1.
In this regular series, LiveScience explores some of the wildest, weirdest parts of our universe, from quantum oddities to hidden dimensions. The building blocks of matter — fundamental particles — come in many more flavors than the basic few that make up the atoms we're familiar with. Flavor is the name scientists give to different versions of the same type of particle .