Editing 1858 in science (section)

==Exploration==
* February 13 – [[Richard Francis Burton]] and [[John Hanning Speke]] become the first Europeans to discover [[Lake Tanganyika]].<ref name="Pocket On This Day">{{cite book|title=Penguin Pocket On This Day|publisher=Penguin Reference Library|isbn=978-0-14-102715-9|year=2006}}</ref>
* May 14 – Dr [[David Livingstone]]'s 6-year [[Second Zambesi Expedition]], under the patronage of the [[Royal Geographical Society]], arrives at the [[Africa]]n coast with the prefabricated iron [[paddle steamer]] ''Ma Robert''.<ref>{{cite web|title=The Zambesi Expedition |url=http://www.livingstoneonline.ucl.ac.uk/companion.php?id=HIST4 |work=Livingstone Online |access-date=2011-08-26 |url-status=dead |archive-url=https://web.archive.org/web/20120302014847/https://www.livingstoneonline.ucl.ac.uk/companion.php?id=HIST4 |archive-date=2012-03-02 }}</ref>
* August 3 – John Hanning Speke discovers [[Lake Victoria]], source of the [[River Nile]].<ref name="Pocket On This Day"/>