Harvested from tiny blisters on the trunk, balsam fir resin was used in the optical industry as a glue. Made into a turpentine, it dries very hard and has a similar optical index to some glass. It was used for decades to glue lens elements and prisms and make permanent microscope slides. 🌿

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Shore Larks on Holme beach. Didn't manage to see any last winter, so pleased to get a good view of three in the howling northerly winds this afternoon #UKBirding #norfolkbirding #birds

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Have you ever seen the Milky Way? If not, then look up tonight after 10pm. This river of light passes directly overhead. Our view from the North Pennines is one of the best in England. What is it? Simply put it is a cross section of our very own galaxy. #northpennines #darkskies

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A Jay wing - in freeze frame mode. It's interesting to see the "blue wing bar" of the Jay in its individual component parts. #Jays #Corvids.

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Research opportunity at Leeds Uni for someone interested in exploring how quickly rewilded peatland recovers to become a climate resilient landscape yes-dtn.ac.uk/research/yes...

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