Honeycombs are natural engineering marvels, using the least possible amount of wax to provide the greatest amount of storage space, with the greatest possible structural stability. Darwin recognised that explaining the evolution of the honey-bee’s comb-building abilities was essential if his theory of natural selection was to be taken seriously, and in the 1850s he carried out his own experiments at his home at Down House in Kent, and exchanged many letters on the subject. One correspondent even drew an ingenious analogy with a plum pie - you can try this at home!
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Joseph Dalton Hooker, from the portrait by George Richmond, 1855 Cambridge University Library
The scientific results of the Beagle voyage still dominated Darwin's working life, but he broadened his continuing investigations into the nature and origin of species. Far from being a recluse, Darwin was at the heart of British scientific society, travelling often to London and elsewhere to attend meetings and confer with colleagues, including the man who was to become his closest friend, Joseph Dalton Hooker. Down House was altered and extended to accommodate Darwin’s growing family; and, with his father’s advice, Darwin began a series of judicious financial investments to ensure a comfortable future for all those under his care.
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Cambridge University Library
Darwin's study of barnacles, begun in 1844, took him eight years to complete. The correspondence reveals how his interest in a species found during the Beagle voyage developed into an investigation of the comparative anatomy of other cirripedes and finally a comprehensive taxonomical study of the entire group. Despite struggling with a recurrent illness, he continued to write on geologicy, and published notes on the use of microscopes. Three more children, Elizabeth, Francis, and Leonard, were born during this period, but the death of Darwin's father in 1848 left the family well-provided for.
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