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Dinosaurs are extinct.

Dinosaurs have been an extinct species for millions of years.

Unless whales are protected, they will become extinct.

Many species will have become extinct by 2010.

People fear that the tiger may become extinct.

extinct volcano

This custom became extinct a long time ago.

If we don't make the utmost effort to protect the rainforests, many of the rare species in them will become extinct.

Gambling site lets users bet on which species will go extinct because of the oil spill in the Gulf of Mexico.

Endangered species are going extinct faster than ever.

Many tribes became extinct when they came into contact with Western illnesses.

Pandas could soon become extinct if we don’t protect them.

If temperatures continue to rise, 30% of species will probably become extinct.

This species of animals is already extinct.

The great majority of species that have ever lived are now extinct.