Sunscreens (防晒霜) can offer protection from two types of ultraviolet (UV) rays (紫外线): UVB, which according to the Skin Cancer Foundation, are the chief cause of sunburn and play a key role in the development of skin cancer, and UVA, which get through the skin more deeply and are largely responsible for skin aging and wrinkling, as well as skin cancer risk. The SPF (防晒指数) measurement on sunscreens refers to the UVB protection level — and the number may not mean what you think it does. SPF 15 doesn't protect you from 15% of UVB rays, just as SPF 100 doesn't protect you from 100% of the rays. In fact, as you get into the higher numbered SPF sunscreens (think: 50 and above), the difference in UVB protection is actually pretty small.

    Theoretically, though the increase in UVB protection with a super-high SPF sunscreen may be not worth considering, it may help, and certainly can't hurt, to use it — that is, as long as you do so correctly. “The only downside is whether you're giving yourself a sense of false security,” Dr. Gohara says.

    Indeed, as Dr. Wang also pointed out, when people choose increased SPFs, they may actually feel so protected by the product that they finally ignore proper sun protection. “When people use really high SPF products, they tend not to reuse, they tend to stay out in the sun much longer, and they don't use other protective measures such as clothing and hats,” he says. Regardless of any increase in protection that a high SPF may or may not offer, one thing is certain: It doesn't give your body a free pass from sunburns, aging, or cancers, and it doesn't protect you from those things for any greater length of time than the lower SPF options. Both Dr. Wang and Dr. Gohara emphasized that, no matter what the SPF is, it's important to reapply your sunscreen every two hours.

    It was a simple letter asking for a place to study at Scotland's oldest university which helped start a revolution in higher education. A 140-year-old letter written by a lady calling for her to be allowed to study medicine at St Andrews University has been discovered by researchers. Written by Sophia Jex-Blake in 1873, the seven-page document, which urged the university to allow women to study medicine at the institution, was released yesterday on International Women's Day.

    The document was discovered buried in the university archives (档案) by part-time history student Lis Smith, who is completing her PhD at St Andrews Institute of Scottish Historical Research. She said: “We knew that Sophia Jex-Blake and her supporters, in their effort to open up university medical education for women, had written to the Senatus Academicus (校评议委员会) at St Andrews in an attempt to gain permission to attend classes there, but we didn't know documentary evidence existed. While searching the archives for information about the university's higher certificate for women, I was astonished to come across what must be the very letter Jex-Blake wrote.”

    In the letter, Sophia and her supporters offered to hire teachers or build suitable buildings for a medical school and to arrange for lectures to be delivered in the subjects not already covered at St Andrews. Although her letter was not successful, it eventually led to the establishment of the Ladies Literate in Arts at St Andrews, a distance-learning degree for women. The qualification, which ran from 1877 until the 1930s, gave women access to university education in the days before they were admitted as students. It was so popular that it survived long after women were admitted as full students to St Andrews in 1892.

    Ms Jex-Blake went on to help establish the London School of Medicine for Women in 1874. She was accepted by the University of Berne, where she was awarded a medical degree in January 1877. Eventually, she moved back to Edinburgh and opened her own practice.

                                                                             Bread Garrett's Comedy Club

    Category: Comedy

    Best known for his role on the Emmy award -winning sitcom（情景喜剧）Everybody Loves Raymond, Brad Garrett returns to his Vegas roots with his comedy club at the MGM Grand. It is a good place to check out when you need a break from work.

    Prices from: $56.40 and up

    Age restriction: Must be 21 years of age or older

    Show Length: 115 minutes

    Mac King Comedy Magic Show

    Category: Comedy, Magic

    The Mac King Comedy Magic Show is different every afternoon, with lots of audience participation. He is willing to make fun of himself instead of his guests in order to make everyone feel welcome and entertained. The afternoon is kid-friendly from start to finish. Still, whether you're eight or 80, you won't be able to figure out King's secrets.

    Prices from: $40.90 and up

    Age restriction: No age restriction

    Show Length: 90 minutes

    The Mentalist, Gerry McCambridge

    Category: Comedy, Magic

    Using his skills as a “mentalist”, Gerry McCambridge shocks the crowds as he uses his abilities to predict just what audience members will do next. Anyone who has seen the show has walked away in disbelief, amazed by his unusual power.

    Prices from: $34.99 and up

    Age restriction: Under 13 will not be admitted into the theater

    Show Length: 75 minutes

    Rock of Ages

    Category: Plays & Musicals

    The cheerful Rock of Ages brings audiences back to the times of big hair and even bigger bands with 28 popular rock songs from the 80s including Every Rose Has Its Thom, I Wanna Know What Love Is, Here I Go Again, and more.

    Rock of Ages has been nominated（提名）for five Tony Awards including Best Musical and Best Direction of a Musical. It also received a Drama League nomination for Distinguished Production for a Musical.

    Prices from: $74.00 and up

    Age restriction: Must be 15 years of age or older

    Show Length: 125 minutes

    In 2016, designer Liz Ciokajlo received a task from the Museum of Modern Art (Moma) in New York: revisit the Moon Boot, a fluffy-looking snowshoe inspired by the footwear used by the Apollo astronauts.

    Launched in 1972 at the height of the lunar missions, the Moon Boot is an icon of the 20th Century's “plastic age” and the museum administrators wanted a new take on it.

    Ciokajlo set out to reimagine it. She knew only a biomaterial would work in a “post-plastic age”, but the designer also wanted a new destination to inspire it. Our generation's space travel obsession is not the Moon, she thought, but the red planet Mars. And Mars allows you to really think outside of the box.

    The task led her to an amazing biomaterial that had already attracted the attention of engineers innovating m building materials and of top space agencies like NASA and ESA. Her final design, a tall, female, rough-looking boot, can be made on board a spaceship with almost only human sweat and a few fungus spores (真菌孢子), ideal for a seven-month trip to Mars with limited check-in luggage.

    This magic biomaterial is mycelium (菌丝体), the vegetative part of the fungus It looks like amass of white thread-like structures, each called hyphae. Collectively, these threads are called mycelium and are the largest part of the fungus.

    Mycelium has amazing properties. It is a great recycler, as it feeds off a substrate to create more material, and has the potential of almost limitless growth in the right conditions. It can endure more pressure than conventional concrete without breaking. It is a known insulator and fire-retardant and could even provide radiation protection on space missions.

    On Earth it's currently used to create ceiling panels, leather, packaging materials and building materials, but in outer space it stands out for its architectural potential, says artist and engineer Maurizio Montalti, who has teamed up with Ciokajlo.

    For her revisited boot, Ciokajlo wanted to use the human body as the source for some of the building materials and decided to employ sweat. Reusing sweat is not entirely new in space exploration but a novelty approach for footwear. She thinks it might make astronauts feel closer to home during the long journey to Mars.

    The design is still hypothetical, because the real boot submitted for Moma and currently in display at the London Design Museum did use mycelium but not human sweat, as their deadline was too tight, but the science checks out.

    World-famous scientist Stephen Hawking has died at the age of 76. He was often called the most brilliant theoretical physicist since Albert Einstein. But his amazing career actually started as a young man who struggled to get around to doing his homework at Oxford University where he studied physics. He then went on to Cambridge to research cosmology, the study of the origin of universe.

    When he was 21, Hawking's life hit a big hurdle. He was diagnosed with Motor Neurone Disease. The disease causes the brain to stop sending messages to a person's muscles. At the time, doctors said he would only live for around 2 years, but he proved them very, very wrong.

    And with the help of a special wheelchair and speech computer, Hawking spent much of his time researching the beginning of the universe and black holes. His most famous discovery was probably when he demonstrated that black holes emit some radiation, which has since become known as Hawking Radiation. He also spent a lot of time thinking about what existed before the big bang.

    Hawking wrote books that explained his big ideas in ways that could be understood by the average person. In 1988 he published A Brief History of Time. It became really popular and sold more than 10 million copies. However, he wasn't just known for his books. He also had a lot of fun becoming a regular on TV screens around the world. He even had a big Hollywood film made about his life.

    Throughout his life Stephen Hawking inspired people to look beyond our planet and expand our knowledge of the universe. His family says that he'll be greatly missed and the legacy of his amazing ideas will live on.

Lovers often use flowers, chocolates, sweet gifts or grand declarations to express feelings deep in their hearts. But this year, you could let your love take off by traveling with that special someone on a romantic adventure. These are some romantic destinations which might bring new joy to your life and, most importantly, more fun and excitement to your relationship.

Stairs of the Turks, Sicily

Scala dei Turchi, or Stairs of the Turks, at Realmonte, southern Sicily, Italy. The Scala is formed by mud, a sedimentary rock(沉积岩) with a characteristic white color and is a popular tourist attraction and place to sun bath. In the film Malèna, the hero, 12-year-old Renato, always stare at the sunset here with his friends.

Somerset House in London

Located in central London, Somerset House is a popular filming location with its exterior featuring in several big budget Hollywood films. In the winter, its central courtyard is turned into an open-air playground for skating, as seen during the well-received film Love Actually.

Pokhara, Nepal

Pokhara is considered the tourism capital of Nepal. With two major hilltops as viewpoints to see the city and surrounding view, the city has recently added a bungee jumping site (the second in Nepal): Water Touch Bungee Jumping. Visitors also come here for adventure activities such as paragliding and skydiving. In the film Up in the Wind starring Ni Ni and Jing Boran, two young people climb up to the mountaintop and wait for the strong wind to carry them for paragliding. It becomes a moment of spiritual uplift.

Otaru, Hokkaido, Japan

A canal decorated with Victorian-style street lamps runs through Otaru. The city attracts many Japanese tourists as well as Russian visitors. Otaru is well known for its beer, fresh sushi and handicrafts like studio glass and musical boxes. At the poster of Japanese film Love Letter, Hiroko Watanabe stands among the snowy town and honors her dead lover.