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SCIENCESaturday 19 December 2015

Panda cub in Washington is thriving ahead of public debut 

BEN NUCKOLS                    In this photo taken Dec. 14, 2015, animal keeper Nicole MacCorkle holds Bei Bei, the National  China and join the breed-
Associated Press                                                                                                              ing program there.
WASHINGTON (AP) — If           Zoo’s newest panda and offspring of Mei Xiang and Tian Tian, for members of the media at the   Giant pandas are endan-
the youngest giant panda                                                                                                      gered, with roughly 1,800
cub at the National Zoo        National Zoo in Washington. The youngest giant panda cub at the National Zoo is ready for his  living in the wild and 350 in
is stressed out about ap-                                                                                                     captivity, which means Bei
pearing in front of crowds     close-up. Bei Bei will make his public debut on Jan. 16. 		     (AP Photo/Andrew Harnik)       Bei and his sister are being
for the first time, he isn’t                                                                                                  counted on to help per-
showing it.                    es ahead of his public de-      of a stick of butter. Bei       the same age — and is hit-     petuate the species.
Keepers were expect-           but on Jan. 16, when the        Bei, who was a twin — his       ting every developmental       Zoo staffers hope that by
ing Bei Bei to squawk and      panda house will reopen.        brother did not survive         milestone.                     the time Bei Bei leaves,
squirm during an audi-         That’s also around the time     — weighed just 4 ounces         He’s one of four pandas at     they’ll have another young
ence with a small news         Bei Bei will be sure enough     (113 grams) when he was         the Smithsonian’s National     panda to care for. Mei
media contingent ear-          on his feet that he’ll get to   born. Now, at nearly 4          Zoo, along with his mother,    Xiang, who has given birth
lier this week. Instead, un-   venture into the outdoor        months, he’s 17.5 pounds        Mei Xiang, his father, Tian    to three surviving cubs, is
der bright television lights   panda habitat for the first     (8 kilograms) of fur, mus-      Tian, and his 2-year-old sis-  scheduled to be artificially
with cameras clicking, he      time.                           cle, claws and teeth. He’s      ter, Bao Bao. The pandas       inseminated again in 2017.
quickly fell asleep on an      Pandas are famously help-       gaining about a pound a         belong to China, and after     Pandas have been the star
examination table, leaving     less at birth: pink, hairless,  week — he’s bigger than         they turn 4, Bao Bao and       attraction at the National
a small puddle of drool on     blind, and about the size       either of his siblings were at  then Bei Bei will return to    Zoo since China gave the
the tablecloth.                                                                                                               United States a pair of the
Panda biologist Laurie                                                                                                        black-and-white bears
Thompson explained that                                                                                                       after President Richard
before he went in front                                                                                                       Nixon’s historic visit in 1972.
of the cameras, Bei Bei                                                                                                       Efforts to breed them in
was playing with a piece                                                                                                      captivity were long met
of bamboo and trying to                                                                                                       with frustration, but the
walk. Just like a newborn                                                                                                     survival rate has improved
human, he tires easily.                                                                                                       dramatically in the past 20
“I’m very proud of him,”                                                                                                      years.
Thompson said. “Obvious-                                                                                                      Throughout his nearly
ly, he wasn’t too bothered                                                                                                    30-minute appearance
by all the people here. This                                                                                                  before reporters and pho-
is just the beginning for him                                                                                                 tographers, keepers and
as far as people go.”                                                                                                         veterinarians stroked Bei
Bei Bei is ready for his                                                                                                      Bei’s thick, bristly fur, and
close-up. The cub will                                                                                                        he protested only when
make a few appearances                                                                                                        they tried to open his
before selected audienc-                                                                                                      mouth to count his teeth.q

Beijing issues second smog red alert of the month 

BEIJING (AP) — China’s         safe by the World Health        parts of Beijing will fall to   ing accusations that it was    bute 1.4 million premature
capital Beijing issued its     Organization.                   less than 500 meters (1,600     ignoring serious bouts of      deaths per year to China’s
second smog red alert of       Half the city’s cars will be    feet) on Tuesday when the       smog to avoid the eco-         smog, or almost 4,000 per
the month on Friday, trig-     forced off the road on any      smog will be at its worst, the  nomic costs. Some resi-        day. Most of the pollution
gering vehicle restrictions    given day, while barbe-         city government website         dents have defied the odd-     is blamed on coal-fired
and forcing schools to         cue grills and other out-       said. An almost complete        even license plate number      power plants, along with
close.                         door smoke sources will be      lack of wind would contrib-     traffic restrictions and com-  vehicle emissions, build-
A wave of smog is due to       banned and factory pro-         ute to the smog’s lingering     plained about the need to      ing construction and fac-
settle over the city of 22.5   duction restricted. Schools     over the city, it said.         stay home from work to         tory work resulting from
million from Saturday to       will close and residents ad-    Smog red alerts are trig-       accompany housebound           three decades of head-
Tuesday. Levels of PM2.5,      vised to avoid outdoor ac-      gered when levels of PM2.5      children. Others have used     long economic expan-
the smallest and deadliest     tivities.                       above 300 are forecast to       the break from school to       sion. While Beijing’s smog
airborne particles, are set    On Friday afternoon, the air    last for more than 72 hours.    travel to places where the     gets the most attention,
to top 500, according to       was relatively good, with a     Although the four-tier          air is better, while many      the scourge strikes much of
the official Beijing govern-   PM2.5 reading of about 80       smog warning system was         who stay wear air filtering    northern China on a regu-
ment website.                  and the sun shining brightly    launched two years ago,         face masks and run air pu-     lar basis, sometimes forc-
That is more than 20 times     over the city.                  Beijing had not issued a red    rifiers in their homes.        ing the closure of highways
the level that is considered   However, visibility in some     alert until last week, draw-    Scientific studies attri-      because of poor visibility.q
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