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Hidden vertebrate species may double known numbers (Level A1) — a cactus in the foreground with a mountain in the background

Hidden vertebrate species may double known numbersCEFR A1

10 Mar 2026

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Adapted from U. Arizona, Futurity • CC BY 4.0

Photo by Kody Goodson, Unsplash

Level A1 – Beginner
2 min
73 words
  • Scientists found many animal species that were hidden recently.
  • These animals can look almost exactly the same to people.
  • But their DNA shows they are genetically different.
  • Some hidden species may have evolved for a long time.
  • There may be twice as many species overall worldwide.
  • Hidden species can be at risk of extinction today.
  • If a species is not known, it lacks legal protection.
  • Researchers used DNA methods and many scientific studies.

Difficult words

  • species — a group of similar animals or plants
  • hidden — not seen or known by people
  • genetically — in the DNA or the genes of living things
  • evolve — to change slowly over many years
    evolved
  • extinction — when a species stops living anywhere
  • protection — legal help or actions to keep animals safe

Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.

Discussion questions

  • Have you seen animals that look almost the same?
  • Would you like to learn about hidden species?
  • Do you think unknown species need protection?

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