Because of the politics and history of Africa, wild animals there, which are interested in finding food and water not in politics, are in trouble. In the past, there were no borders between African countries, and the animals could travel freely according to the season or the weather. However, in the 19th and 20th centuries, the continent was divided up into colonies and then into nations. Fences were put up along the borders, so the animals could no longer move about freely.

Some countries decided to protect their animals by creating national parks. Kruger National Park, created in South Africa in 1926, was one of the first. By the end of the twentieth century, it had become an important tourist attraction and a home for many kinds of animals. Among these, there were about 9,000 elephants, too many for the space in the park. It was not possible to let any elephants leave the park, however. They would be killed by hunters, or they might damage property or hurt people. South African park officials began to look for other solutions to the elephant problem.

As early as 1990, the governments of South Africa and Mozambique had begun talking about forming a new park together. In 1997, Zimbabwe agreed to add some of its land to the park. A new park would combine the Kruger National Park with parks in Mozambique and Zimbabwe. There would be no national border fences within the park, so that elephants and other animals from the crowded Kruger Park could move to areas of Mozambique and Zimbabwe. This new “transfrontier” park would cover 13,150 square miles (35,000 square kilometers). The idea of a transfrontier park interested several international agencies, which gave money and technical assistance to Mozambique to help build its part of the park.

In April 2001, the new park was opened, with new borders and a new name: The Great Limpopo Transfrontier Park. A border gate was opened between Kruger National Park and Mozambique, and seven elephants were allowed through. They were the first of 1,000 elephants that would be transferred to the world’s greatest animal park.

The world’s African elephants are in serious danger. 【小题1】 And if we do nothing to put an end to the illegal ivory trade, elephants will be extinct from the wild within the next 20 years.

Many believe that an illegal hunter could get ivory without killing the elephant-this is not true. 【小题2】 And the rest lies beneath the surface like an iceberg（冰山）in water. The tusk is not just bone but rather it is alive, filled with nerves and blood vessels（血管）and when broken off, the tusks would likely become infected and lead to a slow and   painful death.

However, there is a new form of hope rising from nature itself. African elephants are being born without the tusks that illegal hunters have targeted for decades. But why is the largest land mammal on earth now being born tuskless?【小题3】

Is such change beneficial to elephants’ survival in the long term? As we know, elephant tusks ate not just glorious-looking. 【小题4】 Therefore scientists are just benspecies.to track the newly tuskless among them, to see how this unfortunate adaptation affects the species.

Ivory hunters are not the only danger faced by elephants today. And more support is needed than ever to create a safe world where elephants can live together with humans happily, tusks and all.【小题5】.

The Shiants, remote, cliff-edged islands off the coast of Scotland are home to 350,000 seabirds. This is the starting point for National Geographic contributor Adam Nicolson’s new book, The Seabirds Cry. Celebrating 10 species in detail, he describes the unbelievable recovery of seabirds and the many adaptations that have enabled them to survive and navigate the oceans, while sounding a loud call for their conservation among severely falling numbers.

Speaking from his home in Sussex, England, Nicolson explains why guillemot (海雀) colonies are information exchange centers: how new research is showing that those long-distance travelers. The shearwaters, "smell" their way across the globe; and what we can do to support seabird populations.

National Geographic has just kicked off Year of the Bird with a cover story by Jonathan Franzen titled "Why Birds Matter ". The beginning of Year of the Bird is beneficial to birds. Nicolson said, "Ill ask you the same question-why? For me, these seabirds are symbols of uniqueness. There is so much on the land where the rest of the living world seems to be controlled by us, but when you go to seabird colonies, there is this pumping, loud and raging uniqueness. It's a glance of the untouched world. ”

“The reason why it's untouched is that, until recently, we have not controlled the oceans that the seabirds depend on. More of them have survived in greater numbers than most other creatures in the developed world, where huge amounts of the animal kingdom have been removed by us. And so one reason these birds matter is that they are symbols of what the world might be if we hadn't done so much damage to it. "He added.

“Seabirds also tend to disappear; they’re not reliably of our world, due to their migration and habits of life. Very deep in our consciousness is a sense that they are ambassadors from another world. And witnessing and feeling that is, I think, one of the great enlargers of life.” Nicolson explained.