11 January, 2026

7 tips in order to keep yourself (and the people around you) sane, if you want to use AI to help you with personal crises.

20 October, 2025

I've been working on a new, free travel app called Freedam. The idea is that in four categories, I try to tell a few stories that to me represent the liberty this city has carried for many centuries.

28 March, 2025

Our food forest in Klarenbeek sits on the edge of a real and developed forest.

20 January, 2025

The internet has been so transformed by social media, paid platforms and content marketing, that people often ignore what the function of a website can be: that of a web-app that does exactly for you what you need it to do.

05 April, 2023

A list of where you can watch all episodes of Cosmos: A Personal Voyage by Carl Sagan - for free - on the internet.

29 March, 2023

A short little book I'm publishing about the history of this botanical buddy.

28 February, 2023

An ongoing project that tries to size up Tesla Energy

02 February, 2023

If your is mainly to help the Ukrainian army win against Russia, where should you send your money?

21 November, 2022

The promises of crypto, bitcoin and Web3 have always sounded interesting but the core question remains: when will the added value of decentralization actually outweigh the inherent costs of decentralization?

02 September, 2018

The Dutch approach to drugs has shown great promise for harm reduction, but it has also shielded problems with drug crime from public view — until now.