What hurts you makes you stronger as a couple. Researchers have found in a small study that S&M activities prompted hormonal changes that could make participants feel closer.
Also in today's links: possible best computer ever, a lame toy based on a good premise
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.


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