It’s close to a year since Steve Horseman died and there is still a hole in the British Geological Survey that cannot be filled. He was a respected colleague, a keen and effective debater of scientific issues, a source of knowledge, a mentor for junior staff and a friend.

As a scientist Steve had rare qualities. He was a combination of a theoretician and experimentalist with an impressive knowledge of chemistry, physics and mathematics. What he didn’t know he could acquire, either as a voracious reader of journals and books or through discussion with a wide range of international colleagues....

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