Listen to the following passage. Altogether the passage will be read to you four times. During the first reading, which will be

We’ve already found more than a million species, / but unearthing the rest was thought to be an impossible task. / But now it seems an army of scientists have taken up the cause. / A new study concludes that we’re in a golden age of discovery, / with 20, 000 new finds charted each year./ There could also be far fewer plants and animals left for them to find. / The researchers say rather than tens of millions of species living on Earth, / there could be between two and eight million. /The scientists also looked at the numbers of species going extinct, /and said this had been overestimated. /