A microscopic worm-like creature survived for at least 24,000 years in Siberian permafrost and then reproduce. Scientists dug up the animal known as a bdelloid rotifer from the Alayeza River in the Russian Arctic. Once thawed, it was able to reproduce asexually, after spending millennia in a state of frozen animation known as crytobiosis.
Source:
Gene Wilder: Young Frankenstein by Mel Brooks, 1974
theguardian.com, Natalie Grover, 07.06.2021
bbc.com, Redation, 07.06.2021
cell.com, Lyubov Shmakova et al., 07.06.2021