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Phosphate fertilizers are made from material typically high in uranium, so they usually contain high amounts of it.

Uranium in the environment Although uranium is radioactive, it is not particularly rare.

Depleted uranium is used as shelding to protect tanks, and also in bullets and missiles.

The first atomic bomb used in warfare was an uranium bomb.

Others are 'unstable' or radioactive since their nuclei change over time through the loss of alpha and beta particles.

The attributes of naturally decaying atoms, known as ‘radioisotopes’, give such atoms several applications across many aspects of modern day life.

Prior to 1905 the best and most accepted age of the Earth was that proposed by Lord Kelvin based on the amount of time necessary for the Earth to cool to its present temperature from a completely liquid state.