How F1's 2021 ground effect differs from its fearsome predecessor

Chain Bear's latest video for Motorsport.com takes a look at the latest details we've seen from Formula 1 about the plans for its 2021 rules revolution - specifically the return of ground effect aerodynamics. The approach that was developed by Lotus towards the end of the 1970s proved so effective that it was banned after just a few years in the early 1980s on safety grounds. Chain Bear explains how the concept works, why it was so dangerous in the past, and how its reintroduction will be managed differently to prevent a repeat of the frightening breed of cars that were produced last time around