In 2021, Maarten Keulemans published 'De Viruswaarheid', a book that delves into the misinformation and conspiracy theories surrounding the COVID-19 pandemic. The book was praised for its thorough research and engaging narrative, contributing significantly to public understanding of the pandemic.

During the COVID-19 pandemic, Maarten Keulemans became a key figure in providing clear and accurate information to the public through his work at De Volkskrant. His articles and analyses on the virus, public health measures, and scientific developments were widely read and appreciated for their clarity and depth.

In 2017, Maarten Keulemans was honored with the prestigious 'De Loep' award for his investigative journalism. This accolade recognized his in-depth reporting on health and science issues, highlighting his ability to uncover complex truths and present them in an accessible manner to the public.

In 2014, Maarten Keulemans published the book 'Het Bestverkochte Boek Ooit (met deze titel)', a humorous take on the world of science and pseudoscience. The book was well-received for its wit and insightful critique of popular science trends, further cementing his reputation as a leading science communicator.

Maarten Keulemans began his career at De Volkskrant, one of the leading newspapers in the Netherlands, where he initially worked as a science journalist. His role involved covering a wide range of scientific topics, establishing him as a knowledgeable and reliable voice in the field.