For example, theres this sea slug that I found out eats algae, which is normally exactly what you think is usual for an underwater marine animal, but guess what?
IT USES THE CHLOROPLASTS FROM THE ALGAE AND THEN GAINS THE ABILITY TO USE PHOTOSYNTHESIS AS A SLUG VIA ABSORBING PLANTS
I remember reading that there are likely still hundreds of scientific research facilities, archives and testing sites in and around Russia and other former Soviet countries that were unfortunately and rapidly shut down or abandoned because of the capitalist coup in 1991.
Imagine all the possible unrealized or half-finished pieces of technology, data or breakthroughs that might be achieved, just sitting in abandoned buildings waiting to be found.