Africa’s great apes (大型类人猿) could lose between 85% and 94% of their range be 2050, a new study finds.

The threats     1    their habitats include climate change, land use, and human disturbance. If the pressure continues, their range     2    (continue) to shrink and their chances of survival will also be likely to decrease. With climate change, some of their lowland habitats are becoming    3     (dry), making it more difficult for great apes to stay. Animals    4    rely on those habitats have to shift their range in order to avoid extinction. All African great apes are classified as endangered or critically endangered. They’re all considered flagship species for    5    (conserve), the researchers point out.

The researcher Jacqueline Sunderland-Groves from University of British Columbia is part of the international team that studied how these threats have    6     impact on the survival of Africa’s apes. Their research    7    (publish) in the journal Diversity and Distributions.

New plans and measures to conserve great apes need to be made in the long term and employ the best science available to guide our efforts in many    8     (aspect). This study demonstrates how we can plan for great apes, placing our efforts on minimizing habitat loss, and extending the current network of    9     (protect) areas to maintain connectivity. We still have to rewrite the future for great apes, and now we just need    10     (make) this a reality.

What is space debris (碎片)? What are the safety threats it presents? Space debris is also called space junk,     1     humans have placed in space. The junk floats around     2     (hundred) of kilometers above the earth. Experts say the main worry is that such debris will hit a space station, satellite or other     3     (equip).

Space debris travels around the earth very     4     (rapid)—about 25, 000 kilometers per hour in low-earth orbit. The junk could cause major damage if it hits satellites or spacecraft. With the number of satellites rising, there    5    (be) more space debris in near-earth space in the coming years.

The American space agency NASA says debris in orbits 600 kilometers or less from the earth will fall back to    6     planet within several years. But space junk above 1, 000 kilometers     7     (expect) to continue circling for a century or more.

In addition to     8     (become) a threat to space property and astronauts, debris also increases the cost for satellite operators. Industry experts have estimated that protection and reduction efforts to deal with space junk account     9     about 5-10 percent of satellite mission costs. One study     10     (conduct) by the Organization for Economic Co-operation and Development (OECD) found that the costs for lower-earth orbits were even higher.