What started as the desire to look better into paintings with so-called hard X-rays, with wavelengths smaller than a nanometer, now leads to an incredible achievement by a team of researchers led by Jom Luiten and Peter Mutsaers. With their compact ‘synchrotron’, which fits in a lab space instead of covering an entire building, they successfully generated hard X-rays in a very narrow wavelength range. This X-ray radiation can also be precisely tailored to the material you want to study. The fact that this is possible with a source of these dimensions is unique in the world. The journey to this milestone reads like an adventure book.