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What happens to information when objects fall into black holes? That is the question posed in Professor Stephen Hawking's last academic work, called 'Black Hole Entropy and Soft Hair.' Dan Damon spoke to Sasha Haco, one of the co-authors of the paper. She worked with Stephen in the department of Applied Mathematics and Theoretical Physics at the University of Cambridge. (Picture: Stephen Hawking. Credit: Â鶹Éç)