The species then vanished until a skull was found in Liberia in 1948.

Many species had vanished by the end of the 19th century, with European settlement.

Some are priceless treasures, because the species have vanished from the earth.

In many cases, he noted, species vanish before they are discovered and classified.

Could this be because species are vanishing in increasing numbers, highlighting the urgent need to pay them some attention?

But it is widely considered a sure bet that many species will vanish.

Scientists believe that the species vanished between 1840 to 1860, most likely during the late 1850s.

But now they, and many other much-loved species, are vanishing fast.

And yet these species are vanishing at the rate of one every half hour, before we can even identify and research them.

Several species of animals have vanished from the region as the forest is cut down.