The world's most expensive stamp, the "British Guiana 1c Magenta," was sold for over $9.5 million in 2014. elaborate
The value of a video game can drastically increase if its instruction manual is still sealed inside its original plastic. elaborate
Some fish, like betta fish, can recognize their owners and even show signs of preference. elaborate
Ferry modeling often involves simulating complex hydrodynamic interactions, meaning the model needs to account not only for the ferry's movement through the water, but also the waves and currents it creates and interacts with. elaborate
The first geocache, placed in 2000, was hidden by Dave Ulmer and was only intended to last a few weeks. elaborate
The world's largest record collection, belonging to Larry Magnuson, contains over 500,000 albums. elaborate