not even during the period of the Snowball (approx. 650·E6 years ago) when our planet was entirely covered with ice and snow for almost 100·E3 years.
p.33; in ....
Lovelock J.; 2002; Gaia - Nuove Idee sull’Ecologia; Ristampa; Bollati Boringhieri editore, Torino - ITA;

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