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Off the Grid: Sally breaks down USA TODAY's daily crossword puzzle, The End of Time
USA TODAY via Yahoo News Singapore· 5 hours agoThere are spoilers ahead. You might want to solve today's puzzle before reading further! The End of...
How does your brain wake up from sleep?
The Conversation via Yahoo News Singapore· 20 hours agoBut when you wake up, in an instant you can be up and at ‘em. How does the brain turn on awareness or consciousness? This question has puzzled scientists...