5 . Moving around Bogota can be a bit of a Jekyll-or-Hyde experience. On the one hand, the city is infamous (声名狼藉的)for having the world’s worst traffic. Yet, on the other, its cycling infrastructure is considered a good model of sustainable urban mobility, according to the Copenhagenize Index, which ranks bike-friendly cities. The Colombian capital generated a now-international movement in the 1970s called Ciclovia, which sees 1.5 million people cycle across 128km of car-free streets each Sunday morning.

So, when the pandemic reached its shores in mid-March, Bogota Mayor Claudia Lopez, an avid cyclist herself, introduced one of the world’s first plans to encourage bike travel, using traffic cones to create 76 km of temporary lanes.

“Everyone started using a bicycle, and they already knew how to get around on one because we have this bike culture thanks to the Ciclovia,” says Carlos Pardo, a local cycling advocate and senior advisor at the New Urban Mobility Alliance. Pardo got involved at the beginning of the pandemic by partnering with a local bikeshare company to provide 400 free e-bikes to health workers. Now, he’s busy persuading the public that the government’s new bike lanes should become permanent fixture (固定设施).

“Some drivers say, ‘you took away our lane’, but we’re saying, we took one car lane and made a two-lane bidirectional bike lane,” he explains. “So, you’re duplicating the effectiveness of the space, and moving more people per hour, per direction.”

Biking has enjoyed a renaissance (复兴) around the world as urban citizens avoid public transport for the relative safety of a two-wheeled commute. Now, many advocates like Pardo are working with local governments in the hope of turning these pandemic-response measures into lasting changes—ones that are more plausible now than ever after lockdowns provided an unprecedented (空前的)opportunities to fast-track infrastructure trials. The results of these urban planning experiments could not only radically shape the way we commute across global cities, but also make them more adaptable to future shocks.

8 . Eric Ashby’s fascination with nature began at an early age. His first article, Bird Photography: an Ideal Hobby for Boys, was published when he was just 16 and illustrated with photographs that he’d taken.

His interest in photography had been sparked four years earlier in 1930, when the wildlife photographer Cherry Kearton came to Southsea, Ashby’s home town, to present a show of his work. The 12-year-old Ashby saw the show and immediately started saving his pocket money to buy a camera for filming wildlife in the nearby New Forest. But Ashby’s films did not reach the public due to the World War II.

In 1953, he and his wife Eileen moved to Badger (獾) Cottage, in the heart of the New Forest. It was here that Ashby perfected the techniques that would make him famous through the new medium of television. His patience and technical knowledge allowed him to film badgers at their holes during daylight — the first time this behaviour had ever been captured on camera.

In 1961, at the age of 43, Ashby finally got his big break, when the BBC showed his 45-minute film The Unknown Forest. The film had taken four years to make and received a very positive response from viewers. The nature writer Richard Mabey was hugely impressed and remarked that the film “changed the standards for home-grown wildlife documentaries”.

After the film was shown, he was given the nickname “the silent watcher”. The nickname not only stuck, it became the title of his second film.

In 1963, Ashby made the first British wildlife film in colour, although it took four years before The Major appeared in its full glory, as the BBC did not broadcast (播放) in colour until 1967.

He was awarded the Royal Geographical Society’s Cherry Kearton Medal and Award in 1975 and in 1992 received an MBE. He died, aged 85, on 6 February 2003, but his legacy lives on.

9 . El Nino is a weather pattern that brings hotter temperatures and less rainfall than usual. It is caused by warmer surface temperatures in the central and eastern tropical Pacific Ocean leading to a change in wind movements. Warmer ocean temperatures lead to more rainfall over that part of the ocean and less rain over Northern Australia.

An El Nino weather pattern has been declared in Australia for the first time in seven years and experts say people should get ready for extreme heat. The Bureau of Meteorology（欧洲气象局） said the country would sweat through hot and dry weather for the rest of 2023 thanks to El Nino and another weather pattern called a positive Indian Ocean Dipole, or IOD, which relates to ocean temperatures.

Both weather patterns have already brought hotter and drier weather to southern and eastern Australia while making heatwaves, droughts, bushfires and having effects on coral reefs much more likely.

Australia’s last El Nino was in the summer of 2015 before cooler, wetter La Nina weather took over. The Bureau said it was very likely El Nino would last the whole Australian summer.

“When a positive IOD and El Nino occur together, their drying effect is typically stronger and more widespread across Australia,” the Bureau warned.

The news comes after an unusually long period of warm spring weather, with some places recording temperatures 15°C higher than the average. A disastrous fire warning was announced for the NSW south coast on Tuesday as firefighters battled against the fire in the Northern Territory, Queensland and New South Wales.

Senior Leeturer in Climate Science at the University of Melbourne Dr Andrew King said the recent hot weather “is a warning of the kind of extremes we’re likely to see more of over the next few months”.