Public book vending machines
An excellent solution for revolutionizing book access and encouraging reading Read more
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I can recommend the book by John Vacca that came out a while back, but it lacks biology and chemistry problems to some extent. A website would serve as an online bank.
Yeah if anyone knows a site that just lists categorised problems with the biggest first, add the link. Biology has lots to answer, starting with the life universe and everything else.
Always wondered why the world didn’t simply list unsolved problems somewhere. Universities should have a poster in each departments lecture hall and toilets, listing that subject’s 10 top problems to solve to remind students to think big. Here’s Wikipedia’s list of unsolved problems in different subjects.