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Welcome back to Giz Asks, a series where we ask experts hard questions about science, technology and humanity's future. Today, we're wondering about the "speed of dark", and for that matter, the scientific nature of "speed" and "darkness". 

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.