Gideon Henderson, Author at 91av Science news and science articles from 91av Sat, 14 Feb 1998 00:00:00 +0000 en-US hourly 1 https://wordpress.org/?v=7.0.1 242057827 Deep freeze – Why does the Earth plunge in and out of ice ages? The answer may lie in an unexpected direction, says Gideon Henderson /article/1848209-deep-freeze-why-does-the-earth-plunge-in-and-out-of-ice-ages-the-answer-may-lie-in-an-unexpected-direction-says-gideon-henderson/?utm_campaign=RSS|NSNS&utm_content=currents&utm_medium=RSS&utm_source=NSNS Sat, 14 Feb 1998 00:00:00 +0000 http://mg15721215.200 1848209