This blog may help people explore some of the 'hidden' issues involved in certain media treatments of environmental and scientific issues. Using personal digital images, it's also intended to emphasise seasonal (and other) changes in natural history of the Swansea (South Wales) area. The material should help participants in field-based modules and people generally interested in the natural world. The views are wholly those of the author.
Friday 27 August 2021
Signs of Life?
Astronomers, looking for life on exoplanets (those associated with other suns), have tended to concentrate on Earth-like bodies. These are, planets of similar mass to the Earth, with water and temperatures like ours. Earth-like planets are, however, comparatively rare. It is also difficult to detect 'biosignatures' associated with 'life' in their atmospheres. Astronomers (Cambridge University) have suggested switching attention to hycean planets (https://www.theguardian.com/science/2021/aug/26/mini-neptune-beyond-solar-system-may-soon-yield-sign-life-hycean-exoplanet-cambridge-astronomer). Hycean ('mini-Neptune') planets are more common. They are much bigger than the Earth, but are hot, ocean-covered with hydrogen-rich atmospheres. The Cambridge astronomers reckon, as hycean planets will be easier to study, we might be able to pick up biosignatures of life in 2-3 years. In time, before destroying life on our own planet?
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