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Figure 5.  Subglacial topography of the Antarctic continent inferred from Ice Flow Perturbation Analysis (IFPA) of ice sheet surface morphology mapped by orbiting satellites (Ockenden et al. 2026). Bedrock relief of 4−6,000 m (13,000−20,000 ft) is widespread beneath the Antarctic Ice Sheet, including tectonically stable East Antarctica. Preglacial bedrock topography was enhanced by erosion of steep-walled valleys (dark blue) by fast-flowing ice streams, while mountains (yellow) that project upward into colder ice have been little eroded. The bedrock surface would rise hundreds of meters in elevation if the load of the ice sheet was removed by melting. Image courtesy: American Association for the Advancement of Science.

May 11, 2026

The first part of the article is titled “Part I: All Living Things Descended From The Survivors Of Snowball Earth”. This second article in the series is based on a new scientific perspective titled "Ecosystem relocation on Snowball Earth: a polar–alpine ancestry for the extant surface biosphere?", published by geologist Paul F. Hoffman of the University of Victoria (British Columbia)...

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