the researchers dipped or soaked brain organoids (brain tissue grown from stem cells) in a mix of ethylene glycol, methylcellulose DMSO and Y27632 (called MEDY) for the cryopreservation of cortical organoids.

They later tested the solution under various conditions to observe the extent to which it could prevent damage.

It involved changing variables, such as the age of the organoids before freezing and how long they were soaked in the solution.

The researchers then allowed the organoids to resume growing after they were thawed for up to 150 days. The researchers observed minimal differences between organoids that had been frozen and those that had not, even in organoids frozen for as long as 18 months, according to Medical Express.

Neat stuff. Still a ways away from freezing a whole brain or organism, but nice incremental steps.