Earth 'entering new extinction phase'

Level: Upper-intermediate B2

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There have been a number of reports recently about extinction of species and a new phase of extinction.

Here is an article about a recent study on the BBC Science & Environment webpage.
Read the article and then answer the following questions:

1) How many mass extinction events have there been so far?

2) When was the last one?

3) True or false: since 1900, more than 40 vertebrate species have disappeared.

4) How many amphibian species are threatened with extinction?

5) How many lemur species are critically endangered?

Answers below!

ANSWERS!

1) Five (we are entering the sixth)

2) 65 million years ago

3) True

4) 41%

5) 94%