From around 1500 BCE, right up to the 14th century, many of our ancestors figured out the time using a sundial - you know, those triangular devices that cast a shadow on a dial below, revealing what hour it was.

They might not be as accurate as the clocks we have today, but sundials still work based on the simple premise of the Sun's predictable shift in position as our planet spins. And now a French engineer has finally brought the device into the digital age, creating a 3D-printed sundial that displays the time in '80s-style digital-style numbers.