2 . Located in the southeast of Canada and with a population of approximately 6 million, Toronto is a big and beautiful city, which has developed from a relatively unknown place over the past half century to the center of culture, trade and communication in Canada.

With its colorful ethnic mix, rich history and breathtaking buildings. Toronto offers non-stop adventures to the tourists. To get a sense of how big, various and magical Toronto is, the best place to start is the CN Tower. From this point, visitors can get a bird's-eye view of the city's amazing scenery and unique geography.

In addition to being an important center of culture, trade and communication in Canada, Toronto is also a major muti-ethnic city. It is the most populous city in Canada and its citizens come from countries around the world and from different kinds of ethnic backgrounds. Every day, in most places of the city, a hundred different languages can be heard on the streets, from Hindi to Greek to French. This, perhaps, explains why former Prime Minister Pierre Trudeau once said that Canada is a mosaic（嵌合体）of cultures and languages rather than a melting pot.

Street signs in Toronto are mostly in English. Weekly and daily newspapers are published in various languages, and the city hosts the successful international film festival each September. It is also home to a popular baseball team the Toronto Blue Jays. Toronto has something for everyone.

Moreover, Toronto has been rated one of the most livable cities in the world by United Nations Human Settlements Programme for many years. At the same time, Toronto is one of the safest, richest cities in the world with the highest standard of living.

5 . The race to introduce the first commercial flying taxi is officially on. Google, Boeing and Porsche are among 20 companies testing their machines, laying the groundwork for wider production and starting to encourage government officials to bring autonomous all-electric vehicles into the skies in just a few years. Lilium, a German start-up company, has raised more than US $100 million from investors. Its prototype jet—which is still seeking certification from European regulators—is able to take off and land like a helicopter, and is quiet enough "to land in some areas that are traditionally off-limits to aircraft"—even midtown Manhattan.

However, the possibility of air vehicles over New York already represents a clear and present danger to public safety. New York skies are already filled with helicopters. Since 1983, there have been at least 30 helicopter crashes in the city. “There are several challenges to overcome before commuters are flying through the air,” said Dalvin Brown in USA Today. Many of the vehicles now being imagined require “magical electric batteries that doesn't exist—yet.” The best that anyone can do right now with an electric battery is 20 minutes of flight. An even bigger obstacle is gaining approval from the FAA(American Federal Aviation Administration), which has strict rules and guidelines for small aircraft, and the National Highway Traffic Safety Administration.

That's why the first practical commercial tests of autonomous taxis are likely to be outside the US, said Jeremy Bogaisky on Forbes.com. “EHang became the first company to receive approval from Chinese aviation regulators to establish an autonomous air-taxi service in Guangzhou.” To succeed in the US, air taxi companies will need much more than that. Taking a small aircraft through the regulatory forest of safety certification to production can cost US $75 to US $100 million.

7 . If documentary A Bite of China presented a feast for the eyes with its appetizing images of cuisines from around the country, Aerial China, a new series that was put on CCTV on Jan. 28, offers another visual treat with its footage (镜头) of the breathtaking beauty of the country's natural landscapes.

The series has 34 episodes, each featuring a different place. The first season's episodes feature scenery from Heilongjiang, Hainan, Xinjiang, Shaanxi, Shanghai and Jiangxi. According to Beijing Daily , it took one year to film the first season, with crew using 16 helicopters and 57 drones. The total distance they covered was about 150,000 kilometers - enough to circle the earth four times.

Their efforts have paid off, however. Aerial China currently has a score of 9.4 points out of 10 on douban. com, an influential rating and review website. The majority of viewers are impressed by the amazing view of nature the show presents. From the gleaming blue of the South China Sea to the vast grassland in Xinjiang, from centuries-old city walls in Shaanxi to busy ski resorts in Heilongjiang, "every frame of this show would make a desktop wall paper," commented Beijing Daily.

But amazing views are not the only thing Aerial China wants to show to the audience. " Every footage conveys the love of our motherland," chief director Yu Le said in an interview with CCTV. “The more you know about the place where we live, the more you feel obliged to protect it. " Yu also hopes that it can bring viewers some food for thought. "It allows audiences to see the world from above with brand new perspectives. It may occur to the audience that human beings are very tiny creatures in the universe and our life is very fleeting (短暂),so we should not dwell on the worries and losses. Just think outside the routine - you'll find an enriched life."

8 . Online Bachelor's Degrees and Programs

The overview

Colleges offer online degrees in a range of fields. Click on a degree program to explore what courses you take, how long the program takes to complete, career options and average salary. For example, to earn an online health science bachelor's degree, you would take courses in public health, health communications and epidemiology(流行病学).

The benefits

Pursuing an accredited(官方认可的)online bachelor's degree can help you take the next step in your career. Through your program, you'll attend online lectures, study from home manage a busy schedule and interact virtually with professors and classmates.

The applicants

An online college degree may appeal to those who want more flexibility in completing their education, or who want to take classes while working full time or parenting. Choosing where to register online will likely be challenging, but below you'll find tools, advice and other resources to make your search easier.

Best online bachelor's programs

U. S. News evaluated several factors to rank the best online bachelor's degree programs, including graduation rates and support services available remotely.

To see the full ranking list, please click here.

9 . There are over 60 zoos in England. We have collected hundreds of reviews, checked the zoo websites, researched several zoo•related resources and visited many of them by ourselves to giv e you this selection: 10 best zoos in England.

10 . When Earth was just a tiny young thing，it birthed many new continents - then it swallowed them all up, leaving just a few traces behind, a new study shows.

These first continents had a special skill for living fast and dying young, but in doing so, they paved the way for solid continents that eventually led to the emergence of plate tectonics（版块运动）， the new study suggests.

For hundreds of millions of years, the current continents have been more or less stable. But very little is known about the continents that existed early on in Earth's history.

To learn more about that early history, the researchers used computers to model the interactions of rock and magma（岩浆） in the Earth’s crust（地壳） and below. The modeling showed that the earliest continents, known as the Hadean (4.6 to 4.0 billion years ago), were weak and likely to destruction. Modern continents have a comprehensive high tensile strength, meaning it’s hard to tear them apart by stretching.

By the time the Archean (4.0 billion to 2.5 billion years ago) began ending the Hadean, the crust which had first formed was almost entirely replaced by the seeds of the modern continents.

In a sense, the researchers found, those lost Hadean continents made the later, more stable continents possible.

The emergence of continents at the close of the Hadean also contributed fertilizer that would later help seed life on Earth, the researchers wrote. Bits of them broke off and entered the atmosphere and oceans, providing necessary nutrients for the life forms that soon emerged.