Francis Upritchard’s Sloth looks like something gathering dust in the dark and creepy archives of the Natural History Museum. On closer inspection, it perhaps might have been hidden away for very good reason. Bejewelled, with all-too human hands, this seemingly long-dead relic is unlike anything in the known animal kingdom. Upritchard’s tampering with history again: she’s made a plausible missing link, a falsified curios, playing on horror-movie expectations of a collective consciousness.