A few years ago, my college at UC Berkeley was searching for a dean. Prof. Joel Cohen was invited to check out the College of Natural Resources. I asked him about his book How Many People Can the Earth Support? (1995) over lunch.
A few years ago, he said, a journalist had called him up saying that he was doing a piece on world population and wanted to know from Joel how many people could the earth support. Joel told the caller that he could not answer …

The HMS Titanic was a giant of a ship. It was doing 21 knots that fateful night.
Now it was 9.40pm, and still the ice warnings came. At no time had Captain Smith or the senior officers ordered a cautionary reduction in speed, or had gone to the trouble of having extra lookouts posted, something which Captain Lord of the Californian had already performed before he called it a day and brought his own vessel to a halt in the ice. When you put-together the ice warnings Titanic had received that …