When you have to urinate but it isn't convenient, your body has a complex system that lets you hold it in until it's safe to do so. This video explains how that mechanism works and just how safe it is to overwork that system.
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Predicting the future is near impossible -- but that doesn‘t stop us all from having a red hot go. Human beings have been predicting the future since the beginning of history and the results range from the hilarious to the downright uncanny.
One thing all future predictions have in common: they‘re rooted in our current understanding of how the world works. It‘s difficult to escape that mindset. We have no idea how technology will evolve, so our ideas are connected to the technology of today.