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Dr Tim Gregory
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Dr Tim Gregory is a nuclear chemist working in the heart of the British nuclear industry. His work takes him to the forefront of nuclear energy, net zero, nuclear medicine, and space power.
Tim is also an author, TV presenter, and prolific public speaker. His books Going Nuclear: How the Atom Will Save the World and Meteorite: How Stones from Outer Space Made Our World were published to critical acclaim.
In 2017, Tim surpassed thousands of applicants for a place in the six-part BBC2 series Astronauts: Do You Have What It Takes? where he was put through the full rigours of astronaut selection and reached the final three. Since then, he has gone on to present on BBC4’s The Sky at Night and has made appearances on Steph’s Packed Lunch, BBC Bitesize, BBC Breakfast, BBC Look North, BBC Points West, Sky News Australia, Channel 4 News, and the Norwegian Broadcast Corporation. He frequently features on local and national radio.
Tim loves nothing more than sharing his love of science. He frequently speaks to audiences of all sizes and ages – from schools, to corporates, to lecturing at the Royal Institution – on topics including nuclear science, chemistry, planetary science, and the importance of science in society. His enthusiasm is infectious and his deep knowledge shines through.
Books
Going Nuclear: How the Atom Will Change the World
Tim Gregory
One of The Times Best Science & Environment Books of the 2025 and Waterstones’ Best Popular Science Books of 2025.
The first book of nuclear environmentalism. A ground-breaking exploration of how to harness the untapped potential of nuclear power to build a sustainable and prosperous future for all.
What if climate change isn’t an environmental challenge, but an energy challenge?
In this visionary book, Dr Tim Gregory urges us to rethink the path to net zero. He argues that the solution to climate change lies not simply in replacing fossil fuels with renewables, but in fully embracing another energy source that emits zero carbon dioxide: nuclear power.
Going Nuclear calls for decarbonisation to be the twenty-first century’s Apollo programme. By interweaving scientific optimism, myth-busting data, and ambitious policy ideas, Gregory illustrates the boundless potential of the atom beyond just clean energy: from advanced medicine and forensics to atomic gardening and space exploration.
This is a bold case for an alternative, sustainable and prosperous future: a world in which abundant energy is available to all.
Meteorite: The Stones from Outer Space that Made our World
Dr Tim Gregory
Meteorite: The Stones from Outer Space that Made our World, is an exhilarating journey into the past, present and future of our planet. In this book, Tim uses fragments of rock to give an insight not only into the Earth’s earliest origins, but also its possible future.
Every rock has a story tell, and none more so than those which have fallen from the sky: meteorites. Originating in the Asteroid Belt between Mars and Jupiter, these rocky fragments offer clues not just to the earliest origins of the Solar System but also to Earth’s very survival into the future.
Meteorite takes us on a journey through the very earliest days of our Solar System, to the spectacular meteorite falls that produced ‘fiery rain’ in 1792, to the pre-solar grains (literally stardust) that were blown in from other solar systems and are the oldest solid objects ever discovered on earth.
Meteorites reveal a story much bigger than ourselves or our planet. As Tim says, ‘it is an epic beyond compare’.
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