50 years ago, superconductors started feeling the pressure
Excerpt from the May 2, 1970, issue of Science News
![a superconductor being squeezed between two diamonds](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/04/022720_EC_50YA_superconductors_feat.jpg?fit=1028%2C579&ssl=1)
The highest-temperature superconductors known occur under extreme pressures, produced by squeezing materials between diamonds (shown).
Steve Jacobsen/Carleton University