https://en.wikipedia.org/wiki/J._B._S._Haldane
The essay title is also the title of an anthology of his essays which you can still sometimes find in bookstores. One of his famous quotes is “Not only is the universe queerer than we suppose, it is queerer than we can suppose.”
Haldane did amazing work on decompression and other things, using himself as a test subject in quite dangerous experiments.
His family was interesting, quite apart from himself. His sister Naomi is a well known Scots Author under her married Name Naomi Mitchison.
His uncle was the Liberal Party politician Richard Haldane who was the secretary of war for UK just before WWI and carried out some reforms which were pretty important in setting how the British army fought in the early part of the great war.