3 ms·
Man has had heavier-than-air flight for over a century now. You'd think that the two notions of airspeed and groundspeed and how they can be completely differen
by simonblack 3y ago
Man has had heavier-than-air flight for over a century now. You'd think that the two notions of airspeed and groundspeed and how they can be completely different would be well-known by now.
- defrost 3y agoWomen have been riding bicycles backwards and forwards on trains for even longer. Many people that think about it get it.