When we think of animal navigation, the dramatic comes to mind: globe-trotting birds, migrating monarch butterflies, and ocean-crossing whales. But on a smaller scale, navigation is no less vital and no less interesting. Take the humble desert ant. Desert Navigator is the culmination of a lifetime worth of study by German zoologist Rüdiger Wehner and his many collaborators. It is an astonishing and lavishly produced book that distils half a century of experiments into a richly illustrated narrative.
They say you should not judge a book by its cover, but in this case, it was the very attractive cover that drew me to read Erebus: The Story of a Ship. Michael Palin, known equally for his early work as part of the Monty Python troupe as for his travel documentaries, here tells a riveting story from the golden age of polar exploration. A tale of high-spirited British imperialism, marine camaraderie, a warship that wasn’t, and the enduring mystery of a vanished Arctic expedition.
What has plate tectonics ever done for us? Not having studied geology, I have a basic understanding of the movement of earth’s continents, but this book made me appreciate just how much of current geology it underpins. Marine geophysicist Roy Livermore, who retired from the British Antarctic Survey in 2006 after a 20-year career, convincingly shows here that the discovery and acceptance of plate tectonics was a turning point in geology, on par with Darwin’s formulation of evolution by natural selection. To paraphrase evolutionary biologist Theodosius Dobzhansky: nothing in geology makes sense except in the light of plate tectonics.
If you have used a compass, you will know our planet has a magnetic North and South pole. You might even be aware that the geographical and magnetic poles are not exactly in the same location. The magnetic poles have a tendency to wander with time. They can even swap places, and we have evidence of a long history of such geomagnetic reversals in the rock record. But how does this happen? And what would the consequences be if this happened today? Earth’s magnetic field offers protection against radiation from outer space, primarily from the sun, so if this field weakens or changes, what will happen to us and our electrical infrastructure? Join science journalist Alanna Mitchell as she explores this topic and delves into the history of electromagnetism.