aquifers

Book review – When the Sahara Was Green: How Our Greatest Desert Came to Be

7-minute read

When seeing the world through a deep-time lens, no landscape feature is permanent. The Sahara, for example, “only” came into existence some 7 million years ago. In that time, it has not always been the parched desert it is now but has been green and verdant numerous times, crisscrossed by rivers and home to hippos, turtles, fish and other animals and plants typical of wetter climes. In this book, retired earth scientist Martin Williams draws on a long lifetime of research and desert expeditions to give a very accessible introduction to the surprisingly complex geography of the Sahara, answering some very basic questions.

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Book review – Weird Earth: Debunking Strange Ideas about Our Planet

7-minute read

Geologist and palaeontologist Donald R. Prothero is a busy man. Next to writing a steady stream of books on geology, fossils, and evolution, he is a noted sceptic. Previous books have addressed cryptozoology, UFOs and aliens, and science denial more generally. In Weird Earth, Prothero debunks conspiracy theories and pseudoscience relating to our planet, making for an entertaining slaying of geological fringe ideas. However, his aim is not merely to demean, but also to show readers what the actual evidence is and how we gather it. If the idea of a flat earth strikes you as unbelievable, buckle up, because it gets much weirder.

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