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Mike Bird
This is so cool. The UK's current heatwave is exposing the outline of ancient hill forts and settlements. Soil quality today is still affected by iron age construction, so the grass on top changes colour at a different pace in the sun. HT
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Mike Bird Jul 8
Replying to @Birdyword
Me, a moron: This is neat in and of itself You, clever online: actually climate change is bad
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