Modern airborne gravity relies largely on measurements of gravity gradients. Given how very small the signal will inevitably be, it is clear that measuring it is bound to be very, very difficult. Nevertheless, it was being done in Australia in the late 1920s with some success.
Ayn Rand was fond of claiming that if a businessman made a mistake, he suffered the consequences. We shall see how that works out for the executives and board of Crowdstrike. The precedents are not encouaging.
When Rose de Freycinet’s mother opened her school for young ladies in 1803, she did so with the aid of a loan of 500 francs from the Abbé Sicard. When, fourteen years later, the school closed, she found a retirement refuge in the Abbaye aux Bois. Abbé to Abbaye, surely there must be some link between the two? If so, it is hard to find.