Worldwide trading of goods is today a powerful channel for the knowledge of far-off natures. Travelling among the goods are living organisms or organic remains that, originating from other countries, reach unexpected destinations.

The boom in tourism facilitates the buying and transport of animals and plants from countries rich in nature. The collecting of insects, of cacti, etc., is also a way of describing natural diversity. The frontier between useful curiosity and banal destruction becomes almost imperceptible.