Kelp
Kelp is a type of large brown seaweed found in coastal wilderness areas, commonly sold as dried supplement powder or capsules for its iodine content.
Estimated value as of 2026 · Source: Nature's Way Kelp supplement (600mg, 180 capsules) average retail price from All…
Fun Fact
Kelp forests serve as vital underwater ecosystems supporting diverse marine life, often called the 'rainforests of the sea'.
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Californium-252 (per gram)
Californium-252 is a synthetic radioactive element produced in nuclear reactors, valued as an exceptional neutron source for medical and industrial applications.
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Lunar basalt specimen collected during humanity's final Apollo mission in 1972.