formula one is now a days very safe due to new saftely regualtions introduces... like crash test fia regulations and Hans Device etc.... yea you can say perhaps boxing
All sports carry risks, and even with the best preventative measures accident do happen. how do you measure danger. I used to be an adventure racer and took part in a variety of sports. I trained and became qualiified in each sport required for a race. the races lasted between 5-10 days and yes danger was alway present from wild animals, nature, gear failure, rash decisions and not knowing what was around a corner. On one occasion in the Amazon I remember we scouted a waterfall deciding where we get out of our kayaks to carry down a waterfall, unfortunatly as we approached the waterfall our kayay hit a rock and we we carried backwards towards the waterfall. We jumped out and I try to grab a rock, missed the first one but got the second one, my fellow paddler grabbed my feet and with the help of two other team members crawled over me to safety. The kayak went over the falls nad we lost a lot of gear but at least we survived. So my vote would go for Adventure Racing