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Clitocybe Nuda: edible and poisonous mushroom?

Why does an ostrich hiding its head in the sand?

Lonesome George - the only representative of an extinct species

How does the butterfly gonepteryx?

Avocado or alligator pear

Golden mustache or callisia fragrans

When and how man appeared on Earth

What are the small planets, and what they represent?

Will the bamboo forests where pandas live?

Where to find snow in Africa - on the hottest continent?

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Cultural science
Beetle woodcutter - titan among insects
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