Expected amount of life lost per hour of:
Riding in a train: 20 seconds
Driving a car: 3 minutes
Riding a motorcycle: 3 hours and 45 minutes.
(from p. 83 of @willmacaskill's excellent book 'Doing good better')pic.twitter.com/2hpaDGoTFU
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I've also ridden a 750cc bike, and also driven many cars, can't be convinced out of feeling more alive & younger after getting off the bikes, IMHO. Track days especially premo. 
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