
Nuclear Reactor
A nuclear reactor is the core component of a nuclear power plant that generates electricity through controlled nuclear fission, with construction costs for a full-scale plant typically in the billions of dollars.
Estimated value as of 2026 · Source: Average of recent US estimates for first-of-a-kind advanced nuclear reactors at …
Fun Fact
South Korea can build reactors for as low as $2-4 million per MW due to programmatic construction experience, compared to over $10 million per MW in the US.
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Mars Rover
The NASA Perseverance Mars Rover is a flagship-class robotic explorer designed to search for signs of ancient microbial life on Mars, launched in 2020 and landed in 2021.

Declaration of Independence
The original 1776 document declaring American independence from Britain.

The Cullinan Diamond
The Cullinan Diamond is the largest gem-quality rough diamond ever found, weighing 3,106.75 carats, discovered in 1905 in South Africa and cut into multiple gems now owned by the British Crown Jewels.

Crown Jewels of England
A collection of royal regalia including crowns, scepters, and jewelry estimated at over $3 billion.