Ask a scientist, and he’d tell you that you can’t put a deadline on science. Research takes as long as it does because of how rigorous the modern scientific process is. Many high-profile experiments can take days – even weeks – to complete.
Then there are the rare experiments that go on for so long that it seems like the researchers simply didn’t consider time as a pressing factor. Some of these experiments started over a century ago and are expected to go on for even longer, making them the longest-running science experiments in history.
This is an encore of one of our previous lists, as presented by our YouTube host Simon Whistler. Read the full list!