Virgin Galactic has said its SS2 craft designed for space tourism could also be adapted into a passenger jet, allowing travel from London to Sydney in two hours but would rely on gravity in orbit, rather than engines, to reach its destination Concorde suffered only one major accident, but it was catastrophic - the 2000 Air France disaster in which all 109 people on board died after the plane hit a piece of debris on the runway as it took off from Paris.
It’s also hard to say how much it might cost to fly hypersonic.
As humans societies have evolved from hunter-gatherers into civilized societies, there have been substantial changes in relations between men and women, with perhaps one of a few remaining biological constants being that both adult women and men must have sexual intercourse for human procreation to happen.
Humans have been compared to other species in terms of sexual behavior.
Thus, the concept of marriage is changing widely in many countries.
It would be sufficiently high to cut down the heat generated because the atmosphere is colder and thinner.
Dating is a stage of romantic relationships in humans whereby two people meet socially with the aim of each assessing the other's suitability as a prospective partner in an intimate relationship or marriage.
It is a form of courtship, consisting of social activities done by the couple, either alone or with others.
These people will have dates on a regular basis, and they may or may not be having sexual relations.
This period of courtship is sometimes seen as a precursor to engagement.