Here is a hotchpotch of things I find interesting and not necessarily related to my outdoor activities.
AI is sprinting while most of us are still tying our shoes (6 Jun 2025)
My LinkedIn post about the rapid progress of AI and how Europe should respond
How I tried longevity supplements and noticed nothing (16 Jul 2024)
A test of some longevity supplements including NR, NMN and Resveratrol
Exploring psychedelics (7 Mar 2024)
My experiments with psychedelics like magic truffles and some tips
FIRE: Financial Independence, Retire Early (16 Feb 2024)
How to stop working early
Some sports personal bests (26 Jan 2024)
Some of my best performances in tennis, ultimate frisbee, running, and other sports
Effective Altruism and the Giving What We Can Pledge (24 Jan 2022)
Donating 10% of your income to effective charities
Longevity Wiki (15 Dec 2021)
Open science education platform on healthy longevity
Climbing Amsterdam (13 Dec 2020)
Links to the reservation pages of climbing gyms in Amsterdam and their locations
Photographing the moons of Jupiter (12 Apr 2017)
A little experiment with binoculars and a simple camera
The adventures of little man Max (31 Mar 2017)
5 children’s stories for age 2-3 yr (updated with AI on 3 May 2025)
Course with Wim Hof ‘The Iceman’ in Poland (21 Feb 2015)
One week of breathing, yoga, meditation and severe cold
Marc’s Cooking (19 Aug 2013)
Some of my favourite home cooked food, including recipes
My YouTube channel (13 Sep 2010)
Some short self-made videos including comedy, outdoor activities and sports
Stone Age – Movie Screenplay (15 Sep 2009)
My attempt at an adventure story contrasting the Stone Age with modern times
Frisbee George Players Handbook (15 June 2005)
Ultimate frisbee strategy playbook for the Amsterdam City League
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