Determining the age of eggs is difficult and requires oology. Preserving eggs by extracting insides or fossilizing them also poses challenges in determining age. Collecting wild eggs is illegal and speckling is more likely in ground-laid bird eggs. Papaya extract can dissolve egg contents.
The age of an egg typically cannot be determined conclusively, unlike most other fossilized animal remains. The study and classification of eggs is a science known as oology. If the eggs are left with their internal contents intact, they will usually eventually rot, which may make determining the age of the eggs more difficult. The eggs can be preserved by drilling small holes in the shells and extracting the insides, and in some cases the eggs become fossilized. Even if fossilized eggs are found, it’s difficult for scientists to study their interior closely enough to determine their age. CAT scans or immersion of the fossils in mild acid can be used to visualize the interiors, but generally age is only guessed by comparing the eggs to other remains found near them.
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Collecting wild eggs was officially made illegal in the United States in 1918, followed by the United Kingdom in 1954, and is generally not permitted worldwide.
Bird eggs are more likely to be speckled if they were laid on the ground, as opposed to a nest in a tree.
Papaya extract is often injected into eggs to dissolve the internal contents, which can take up to three weeks.
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