Sir John Edward Sulston FRS (born 27 March 1942) is a British biologist. He is a joint winner of the 2002 Nobel Prize in Physiology or Medicine.

He is currently Chair of the Institute for Science, Ethics and Innovation (iSEI) at the University of Manchester.

Sulston was educated at Merchant Taylors' School, Northwood and Pembroke College, Cambridge graduating in 1963. He joined the Chemistry Department in Cambridge, gained his PhD degree for research in nucleotide chemistry and devoted his scientific life to biological research, especially in the field of molecular biology. After working as a Postdoctoral researcher at the Salk Institute, USA for a while, he returned to Cambridge to work under Sydney Brenner at the MRC Laboratory of Molecular Biology.

Sulston played a central role in both the Caenorhabditis elegans worm and human genome sequencing projects. He had argued successfully for the sequencing of C. elegans to show that large-scale genome sequencing projects were feasible. As sequencing of the worm genome proceeded, the project to sequence the human genome began. At this point he was made director of the newly established Sanger Centre (named after Fred Sanger and now the Wellcome Trust Sanger Institute), located in Cambridgeshire, England.

John Edward Gray, FRS (12 February 1800 – 7 March 1875) was a British zoologist. He was the elder brother of George Robert Gray and son of the pharmacologist and botanist Samuel Frederick Gray (1766–1828).

Gray was Keeper of Zoology at the British Museum in London from 1840 until Christmas 1874, before the Natural History holdings were split off to the Natural History Museum. He published several catalogues of the museum collections that included comprehensive discussions of animal groups as well as descriptions of new species. He improved the zoological collections to make them amongst the best in the world.

Gray was born in Walsall, but his family soon moved to London, where Gray studied medicine. He assisted his father in writing The Natural Arrangement of British Plants (1821). After being blackballed by the Linnean Society he turned his interest from botany to zoology.^{[citation needed]} He began his zoological career by volunteering to collect insects for the British Museum at age 15. He officially joined the Zoological Department in 1824 to help John George Children catalog the reptile collection. In 1840 he took over from Children as Keeper of Zoology, which he continued for 35 years, publishing well over 1000 papers. He named many cetacean species, genera, subfamilies, and families.