- Wilhelm Gueinzius ornithological collection sold to the museum of Leipzig University
- Ludwig Becker leaves Germany during the 1848 revolution. Many scientists left Europe at this time.
- Thomas Richard Heywood Thomson and William Allen publish A narrative of the expedition sent by Her Majesty's government to the river Niger, in 1841, under the command of Capt. H. D. Trotter, R.N
- Hugh Edwin Strickland publishes The Dodo and its Kindred
- Death of Ludwig Leichhardt
- Joseph Wolf arrives in London and begins work at the British Museum
Ongoing events
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