1 . Turtles have an unfortunate habit of eating plastic objects floating in the sea. These then cannot be broken down and digested, and may ultimately kill them.

It is widely assumed that this special liking for plastics is a matter of mistaken identity. Floating plastic bags, for instance, look similar to jellyfish, which many types of turtles love to eat. Yet lota of plastic objects that end up inside turtles are not similar to jellyfish. Joseph Pfaller of the University of Florida therefore suspects that the smell of micro-organisms (微生物) which grow on floating plastic objects fools turtles to feed.

Researchers at the University of California noticed that certain chemicals, which are released into the air by micro-organism — colonised plastics, are those which many seabirds sniff to track down food. These chemicals mark good places to hunt because they indicate an abundance of the seaweed and bacteria. Since turtles are known to break the surface and sniff the air when swimming towards their feeding areas, Dr. Pfaller indicated that they are following these same chemicals, and are fooled into thinking that floating plastic objects are edible.

To test that idea, he and his colleagues set up an experiment. They arranged for 15 of the animals, each around five months old, to be exposed, in random order, to four smells delivered through a pipe to; the air above an experimental area. The smells were: the vapour from deionised (去离子) water; the smell of turtle-feeding meal; the smell of a clean plastic bottle; and the smell of a similarly plastic bottle that had been kept in the ocean for five weeks to allow seaweed and bacteria to grow on it. Two of the smells-the smell of meal and that of five-week-old bottles-proved far more attractive to the animals than the others.

On the face of it, then, the turtles were responding to the smell of old bottles as if it were the smell of food. In an unpolluted ocean, pretty well anything which had this smell would be edible-or, at least, harmless. Unfortunately, five-week-old plastic bottles and their like are not.

7 . Life Begins on Board Your Next Cruise(邮轮)

On a cruise, it’s all about choices. And never about effort or annoyance. Simply step aboard and float away, as your grand accommodation takes you from port to port, country to country. Maybe you haven’t been on a cruise yet. Let’s see what it might look like.

Rise and shine

Everyone is a morning person on a cruise. Wake up to find yourself floating joyfully somewhere out on the horizon, between vast blue skies and rolling oceans. You’ve travelled far through the night, and each morning begins with a completely new and foreign destination calling from outside your window. What a way to start your day!

Breakfast of champions

Before the morning truly begins, spend some time relaxing on the top floor with a steaming cup of coffee and warm French pastries, taking in the unbelievable views and the fresh sea air. Or head to one of the many restaurants on the ground floor to find a rich meal fit for a king, then walk to the front of the ship and have some fresh fruit and American pancakes in the open-air market.

Ease into your day

Energize your morning with a yoga class, strengthening your body on the open-air board, palms stretched to the sea. Hit the gym for a refreshing workout or take a swim that will set you up for the day. If you are not so sporty, simply spend your morning sitting by the pool reading a book, perhaps losing yourself in the history, culture and legends of your next port of call.

8 . Freshmen at Central Valley High in Ceres had a busy week of good deeds, tied to Pay It Forward Day, April 30, and an urge to show the world that teens can be awesome.

Kids in Success 101 spent first period making sandwiches for the homeless. The classes, taught by Natalie Rowell and Becky Lynch, got to hand 200 bagged sandwiches to the charity giving out the food. “They got to really see what an impact they had. It was inspiring and heartwarming,” Rowell said. Besides, students also made blankets to send to soldiers, and created 45 flower arrangements for senior people at the Hale Aloha Home in Ceres. “They were nervous going into it. But when they saw how happy the elderly were, the reality of what they did really surfaced,” Rowell said.

Rowell said she liked working with children. get to see how they learn. “It's different from how we learn, but we're kind of the same because they struggle in some of the subjects that we find hard as well.”

Success 101 was tailor-made for students with that kind of insight. The first-period class includes study help, speakers on teen subjects and an overall focus on looking past high school, figuring out the steps to create their future. “Some kids need that little push. In this class, that's what we do, we give them that little push,” Lynch added. “Success would be beneficial for all ninth-grade students. Since the start of the year, I really see a change in them.”

Raquel Alfaro, a teen participant who worked with the younger kids, likes the Pay It Forward idea. “This helps us show adults, and also kids, that we're doing something different and that we're not as mean and selfish as they think we are," Alfaro said.

9 . Perhaps thousands of people have searched for a bronze chest full of gold and jewels hidden in the Rocky Mountains between Santa Fe and the Canadian border hidden by a millionaire adventurer. At least four people died in their search for the treasure.

But it's all over now. Fenn's Treasure has been found. The 89-year-old adventurer named Forrest Fenn, who created the treasure hunt, announced the news via his website. “I don't know the person who found it, but the poem in my book led him to the precise spot,” Fenn wrote. “The treasure was confirmed by a photograph the lucky finder sent me.”

Forrest Fenn, the man who started the hunt, lives in Santa Fe. He was a pilot in the Vietnam War and later accumulated his wealth as a dealer in art and antiques. Fenn was diagnosed(诊断) with cancer in 1988 and had planned to die peacefully in the woods with his treasure. But when his cancer became less serious, he changed his plan, eventually writing the poem that described his dream resting place, which is where he hid                           the treasure. The poem appeared in a memoir called The Thrill of the Chase. Fenn said that the chest wouldn't be found by accident; only a treasure hunter who correctly interpreted the clues(线索) would find it.

Several treasure hunters went missing while attempting to find the chest, including hunter Jeff Murphy and Mike Petersen, both of whom went missing in Yellowstone National Park in 2017. Fenn said that he had never been to the Yellowstone National Park, and that the treasure was not in a dangerous place. "It was in the thick forest of the Rocky Mountains and had not been moved from the spot where I hid it more than 10 years ago," Fenn wrote on his website. It is illegal to remove anything from a national park, which would cause trouble in legally claiming the treasure if it was found there.

10 . Beethoven is a giant of classical music. And the most influential, too—at least, when it comes to piano compositions. That's according to a study in the journal EP J Data Science.

If you're wondering how data analysis could determine something as abstract as cultural influence, it's worth remembering this: Music is the most mathematical of the art form, a lot of which is symbolic. The music is written in symbols that are connected in time.

Juyong Park is a theoretical physicist in South Korea. Park and his colleagues collected 900 piano compositions by 19 composers from 1700 to 1910. Then they used that mathematical quality to their advantage by dividing each composition into what they called “code words”, in other words, a chord. They then compared each chord to the chord or note that came after it, which allowed them to determine how creative composers were at coming up with novel transitions.

The composer with top marks for novelty was Rachmaninoff. But when the researchers looked at those chord transitions across all 19 composers, it was Beethoven who was most heavily borrowed from—meaning at least among the composers in this analysis, his influence was the largest.

Their study comes with some drawbacks. For example, the researchers only considered piano compositions in this work, and by only studying chord transitions, so their conclusions wouldn't relate to artists who were influential in other ways like Bach or Mozart. Park explained, “It's well understood that Mozart's contribution to music comes from the musical forms that he designed. That was not very well reflected by our mathematical modeling.”

As for Park, the results convinced him he has some listening to do. “Of course I listen to music. I like Rachmaninoff’s music, but I have to say I have listened to Beethoven way more than Rachmaninoff. So after this work came out, I ended up buying his whole complete collection.