Many people claim to have distant family trees, going back to Charlemagne, Charles Martel, or even Adam and Eve. But while many of these may have some truth - and, statistically, most of us probably are related to Charlemagne in one way or another - many long trees ultimately rely on leaps of faith. Many old records are far more vague than birth certificates, and many of our high-climbing ancestors even falsified such links to try and prove their worth.
So how long is the longest tree that has a chance of standing up to scrutiny? It's hard to say for sure, and there doesn't seem to be agreement on a single case, but here are three of suggestions we've come up with. If you know of any other examples, drop us a message in the comments down below.