Paul Dirac (BSc 1921)
Theoretical physicist who was awarded the Nobel Prize in 1933 for discovery in atomic theory.

Cecil Powell (Diploma 1940)
Recipient of the Nobel Prize in Physics in 1950 for his discovery of the pion, following his development of the photographic method of studying nuclear processes.

Kun Huang (PhD 1948)
Awarded the State Preeminent Science and Technology Award (the highest science award in China).

Professor Cecil McMurray CBE (PhD 1970)
Named by the UK Science Council as one of the UK's top 100 practising scientists in 2014, and awarded a CBE in 2002 for public service. 

Philip Campbell (BSc 1972)
Editor-in-Chief of science journal Nature, and Fellow of both the Institute of Physics and the Royal Astronomical Society.

Professor Martin Bigg (BSc 1977)
Professor of Environmental Technology at the University of the West of England and former Director of the Environmental Technologies Innovation Network (iNet).

Dr Michael Gunton (BSc 1979)
Television producer and Creative Director of the BBC Natural History Unit.

Dr Tony Juniper (BSc 1983, Hon DSc 2013)
Former Director of Friends of the Earth, writer, campaigner and environmental adviser.

Professor Sir Mark Welland (PhD 1984, Hon DSc 2014)
Professor of Nanotechnology at the University of Cambridge, who also played an extensive role in the research for, and management of, Bristol's Centre for Nanoscience and Quantum Information.

Dr Wendy Darke (BSc 1986)
Founder and CEO of Bristol-based independent production company True to Nature Ltd (and former Head of the BBC Natural History Unit)

Dr Charlotte Uhlenbroek (BSc 1988, PhD 1997)
Zoologist and TV presenter who has spent years studying chimpanzee behaviour in Tanzania.

Merlin Hyman (BA 1992)
Chief Executive of Regen SW, an independent not-for-profit organisation that works with industry, communities and the public sector on sustainable energy projects in the south west.

Tom Davies (BSc 1995)
CEO and Co-Founder of Edge Consultancy, specialising in measuring, understanding and managing the environmental and social impacts of products, services and operations.

Dr Louise Leakey (BSc 1995)
Paleontologist and former National Geographic Explorer-in-Residence, who currently runs a research station at Kenya’s Lake Turkana to facilitate the study of new specimens. 

Dr Adrian Seymour (PhD 2000)
Wildlife ecologist and film-maker who was named one of National Geographic's Emerging Explorers in 2011.

Niall McCann (BSc 2004)
Adventurer and zoologist who has also presented wildlife documentaries on the History Channel and Nat Geo Wild.

Dr Mark Thompson (PhD 2008)
Leading a team of scientists and engineers, Mark has ensured a major step forward in the race to build a quantum computer due to generating single photons on a silicon chip.

Professor Alice Roberts (PhD 2008)
Professor of Public Engagement in Science at the University of Birmingham, regular science columnist for The Observer, and BBC presenter.