Guest Post: Building a habitable planet

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NASA

‘How to build a habitable planet’ is the title of a popular American college textbook which tells the story of the Earth from ‘The big bang to humankind’. It’s a big book – because it is a long story. All the evidence we have suggests that in its infancy the Earth was a most inhospitable planet and not very different from its near neighbours. Back then it had a transient volcanic landscape, a carbon-dioxide-rich greenhouse atmosphere and was periodically bombarded with asteroids from space. In contrast today we see a planet with mobile tectonic plates, oceans, continents, an oxygenic atmosphere and teeming with life, fundamentally different from Mercury, Mars or Venus. So, why? What is it about the history of the Earth which makes it so different now from its near neighbours? Continue reading

Guest Post: A hostile start to life on Earth

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Pixabay

Life on Earth had a rocky start – literally. For hundreds of thousands of years the planet was a hellish place. This period in geological history is called ‘Hadean’, and it was thought that no living thing could have survived. Life emerged so soon after Earth cooled that scientists have wondered how it could have been possible – but new results this year tell a different story. Continue reading

Guest Post: Making the Molecules of Life

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© Christian Mehlführer, Creative Commons Attribution 2.5 Generic license

At what point did chemistry become biology? In what type of environment did this transformation take place? These are major questions for those seeking to understand the origins of life on Earth. Continue reading

Guest Post: Life as old as the Earth? The earliest evidence for living things

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Cross-section of a fossil stromatolite © James St John, flickr, https://creativecommons.org/licenses/by/2.0/

The history of life on Earth is almost as long as the history of Earth itself. The most precise scientific dating methods tell us that our planet formed 4567 million years ago, although there are no rock samples preserved from this ancient and chaotic time. The oldest known Earth materials are about 4300 million years old, and are found in the remote deserts of western Australia. The oldest probable evidence for life on Earth has been dated between 3700 and 3800 million years, in west Greenland, and is so sophisticated that the history of life on earth must extend much further back. These observations suggest that life is a fundamental property of our planet, a feature which makes the Earth very different from its immediate rocky neighbours. Continue reading

Dinosaurs in your garden: An interview with Lizzie Coyle

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Archaeopteryx fossil By James L. Amos (National Geographic Society) [CC0], via Wikimedia Commons
Did you have the chance to explore science and religion when you were younger? A safe place to explore new ideas and questions between subject boundaries? Today we hear (transcript below) from someone who works to create and encourage such a space – introducing Lizzie Coyle and her travelling bag of fossils. Continue reading

Worshipping God with Science: Beauty from the Earth

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Grossmünster in Zürich By Roland zh (Own work) [CC BY-SA 3.0], via Wikimedia Commons
 I’m always keeping my eye out for ways to bring science into a church context, and I recently found a new one in Switzerland. Two buildings in the centre of Zurich, the Grossmünster (great minster) and Fraumünster (women’s minster) are decorated with the most incredible stained glass, designed by the artists Marc Chagall, Augusto Giacometti and Sigmar Polke. I had already seen examples of scientific themes in stained glass, such as the windows by David Hunt in St Crispin’s, Braunstone, but some of Polke’s windows took this idea to a new level. Continue reading

Guest Post: Not Just Mud

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© Nikki Baggaley

IYS_logos_enThe International Year of Soils finished with World Soils Day on the 5th December, so as a soil scientist I jumped at the opportunity to write about something that is more than just mud. Through studying soils, I have learned Continue reading