“All it takes,” said Crake, “is the elimination of one generation. One generation of anything. Beetles, trees, microbes, scientists, speakers of French, whatever. Break the link in time between one generation and the next, and it’s game over forever.”

Source: Theses on the Philosophy of History (1940), II
Context: There is a secret agreement between past generations and the present one. Our coming was expected on earth. Like every generation that preceded us, we have been endowed with a weak Messianic power, a power to which the past has a claim. That claim cannot be settled cheaply.

This Business of Living (1935-1950)

Explosions generate elastic waves by an impulsive change in volume in the material. Small explosive charges are used in controlled-source seismic experiments in which the waves penetrate only a few kilometres into the earth.
[Seismology and plate tectonics, 1990, http://books.google.com/books?id=tZRxPzwoChIC&pg=PA12] (p. 12)
Seismology and Plate Tectonics (1990)

Message to the Participants in the United Nations Framework Convention on Climate Change (1 December 2019) http://w2.vatican.va/content/francesco/en/messages/pont-messages/2019/documents/papa-francesco_20191201_messaggio-carolina-schmidt.html <br class="br">2010s, 2019

"Academe and I" (May 1972), in The Tragedy of the Moon (1973), p. 224
General sources