Here is a list of corrections and additions for the first reprinting.
Some bats have a mechanism for making themselves temporarily deaf when emitting sound bursts.
They use high frequency sound because their prey is small. His first paper, written when he was seventeen, concerned the mediaeval tax records in Novgorod. After he had presented his conclusions to a seminar he asked the historian in charge whether he agreed with them. Next day, Kolmogorov switched to mathematics. Thereafter, adding manpower to a software project actually makes it slower.