Freezing is one of the simplest methods of preserving food, biological tissue and other perishables, but the formation of ice crystals can damage cells. Now, researchers have developed a new way to “supercool” water in a liquid form well below the usual freezing point.
Two worms frozen in the Siberian permafrost for around 40,000 years have now been thawed and revived, making them the oldest living creatures on the planet and the first multicellular organisms to have survived such long-term cryobiosis.
While deep-freezing techniques exist to preserve organs for long periods of time, the tissue can get damaged when being reheated, making it an impractical solution for transplants. Researchers at the University of Minnesota believe they've solved this problem thanks to tiny microscopic particles.