Many people don't consider their breakfast without a glass of milk. Right now, cows, buffalos, goats and sheep provide most of the world's milk. But soon, people could get milk from roaches(蟑螂).

    That isn't as crazy as it might sound. New research shows this “milk” is super-nutritious. What's more, some scientists have already begun referring to a lot of insects as source of milk.

    In 2004, Subramanian Ramaswamy started studying milk crystals found inside the roach. At the time, he was teaching biochemistry at the University of Iowa City.

    To learn more about the milk crystal from roaches, the scientists used X-rays to look at the atoms in it. The data basically revealed the chemical recipe of the roach crystal. They showed that roach milk is a “complete food”. It contains sugar with a fatty acid stuck to it. Fatty acids are the building blocks of fats. The protein in the milk is also full of essential amino(氨基的) acids, which are the building blocks of proteins. Since our bodies can't produce the “essential” ones, we need to get them from our food. And so do baby roaches.

    Barbara Stay, a biologist at Iowa University, also worked on the new study. She says the new data show that the roach milk is “three times more nutritious than cow's milk and four times more nutritious than buffalo's milk”.

    Ramaswamy would like to see roach milk turned into a protein supplement to feed hungry people. But not everyone is confident that it can be done.

    Marcel Dicke studies insects as a potential source of human food at Wageningen University in the Netherlands. Dicke says this is a “sound study”. However, in his opinion, “Extracting(提取) milk from roaches can only likely be done in a destructive way with only small quantities”. That means you'd have to raise and kill many bugs to get even tiny quantities of the milk.

    You dash through a crowded railway station, tripping over bags, spilling (泼出) your coffee, only to have the doors slide shut in your face, leaving you breathless on the platform as the train pulls away,

    But at least, if you're in France, someone may be playing the piano for you. But it won't be performed by a paid musician, or even a street entertainer playing for coins. It will just be a random passer - by, jamming for the fun of it on one of the pianos that the national railroad company, S. N. C. F., has fixed in nearly 100 stations across France. They are free for anyone to play, and travelers from all walks of life have taken to doing just that.

    Gares & Connexions, the S. N. C. F. division that manages its stations, rents the instruments from the producer, Yamaha: which maintains them and tunes them every month or two. The first one was set up in the Gare Montparnasse in Paris in 2012.

    The music, mixed with the sounds of shouting passengers, screaming trains and rolling suitcases, gives French stations a special soundscape. The amateur musicians have included Irish soccer fans and even babies. In 2014, Gares & Connexions and Yamaha organized a nationwide contest called Your Turn to Play, asking participants to submit videos of themselves using one of the pianos. It drew nearly 900 entries.

    Isn't the railroad company taking a big chance? Apparently not: “None of the instruments has been vandalized to this day, or even merely damaged,” said Claire Foumon, a spokeswoman for Gares & Connexions. “They are shared and respected by all.”

    So if you miss a train in Paris; Bordeaux or Marseille one day, perhaps someone will be playing a favorite piece that will ease your pain. Or perhaps you'll sit down and play your annoyance away yourself.

    Imagine on your way out of class today you trip (绊倒) on a loose piece of carpet and twist your ankle. As a result of the injury, you lose your place in the local sports team, and have to miss an important job interview. Bad luck? Or an opportunity to get rich quick?

    Perhaps it's not surprising that Roslyn Darch of Houston, Texas, USA felt annoyed when she tripped over a toddler (学步的儿童) running around a furniture store, and broke her ankle. But a few months later, she was $780,000 richer after she successfully sued (起诉) the shop. The owners were clearly surprised at the size of Roslyn's payout, particularly since the toddler she tripped over was her own son.

    And it's not only claims for physical injuries that are keeping the lawyers busy. A group of overweight New York teenagers sued a giant fast-food company claiming that they had not had enough warning that a diet of burgers, fries and milk shakes would make them fat. The parents of one nineteen-year-old English schoolgirl successfully sued her school for 42,000 compensation when she failed to get a top grade in a university entrance exam. Sandra York received $113,000 from a Washington D.C. restaurant after slipping on a spilt soft drink.

    Who knows where it will end? Some say there should be penalties (处罚) for excessive (过度的) claims, or that there should be a limit on payouts. But one thing's for sure—in the end, the only certain winner is the lawyer!

    I went up to Peet's Coffee the other morning and there was a young man, Mike, probably my age. With him he had all his physical belongings on a small roll cart. I first thought, how nice to have so few possessions. That was followed with the thought of how ironic (讽刺的) it is that we live in one of the financially wealthiest areas of the U.S., if not the world, yet we can't, or don't, take care of the basic needs of human beings. Yes, we are financially wealthy, but we lack in wealth of compassion (同情), kindness, and understanding. I tear up as I ponder the inequality and injustice that exists.

    Anyway, I invited Mike in for a bite to eat and he eagerly accepted. He talked about looking up a friend for a place to stay that night. On Christmas Eve as many eagerly and greedily stuff their bellies with food in nice, warm homes and then open presents, Mike just wanted a place to spend the evening.

    Then I was really blown away. As he waited for his sandwich, Mike began cleaning up the condiment (佐料) area. He took some paper and wiped up the spills of others and rearranged the milks and other condiments, making everything neat and orderly. Here is a person with very little and he's serving others in a way that's just natural to him.

    I spoke with Mike about this afterward, thanking him. He said he always did that sort of thing—straightening up. To him, it was just common politeness. I just asked him for a hug and we parted to go our separate ways. There is a lot for us...me... to learn in the most unlikely place.

    The negative (负面的) health effects of sleep shortages during the week can't be changed by marathon weekend sleep sessions, according to a new study.

    Researchers have long known that routine sleep deprivation (缺乏) can cause weight gain and increase other health risks, including diabetes. But there are still some people who hope that shutting off the alarm on Saturday and Sunday will repay the weekly sleep debt and remove any ill effects.

    The research, published in Current Biology, ruins those hopes. Despite complete freedom to sleep in and nap during a weekend recovery period, participants in a sleep laboratory who were limited to five hours of sleep on weekdays gained nearly three pounds over two weeks and experienced metabolic disruption (代谢紊乱) that would increase their risk for diabetes over the long term. While weekend recovery sleep had some benefits after a single week of inadequate sleep, those gains were wiped out when people returned right to their same sleep schedule the next Monday.

    "If there are benefits of catch-up sleep, they're gone when you go back to your routine. It's very short-lived," said Kenneth Wright, who led the research. "These health effects are long-term. It's kind of like smoking once was — people would smoke and wouldn't see an immediate effect on their health, but people will say now that smoking is not a healthy lifestyle choice. I think sleep is in the early stage of where smoking used to be."

    Wright said that the study suggests people should prioritize sleep — cutting out the optional "sleep stealers" such as watching television shows or spending time on electronic equipment. Even when people don't have a choice about losing sleep due to child-care responsibilities or job schedules, they should think about prioritizing sleep in the same way they would think about a healthy diet or exercise.

Western monarch butterflies(帝王蝶)spend their winters on the central California coast. A few months later, they produce young in the Central Valley and as far north and east as Idaho. But where they go in between remains an open question to biologists. Therefore, a group of biologists call on anyone who spots a monarch north of Santa Barbara this spring to get a quick shot(镜头)and email them the photo with a date and a location.

"Something's going on in early spring," said Cheryl Schultz, a professor at Washington State University Vancouver. "Winter survival isn't the problem in the short term, but they don't know whether the monarchs are not making it producing places, not finding plants to feed themselves along the way," she said.

The Western monarch population stood in the millions in the 1980s. In 2017, an annual count found 200,000 butterflies. In 2018, the number fell to about 30, 000-a figure that held steady last year. The monarchs' decline is part of a large trend among dozens of butterfly species in the West. What exactly caused the decline? Biologists attach it to a variety of reasons. Many chemicals are sprayed on the milkweed(乳草)monarchs will feed on. Climate change also plays a role in challenges facing monarchs. Yet, they're not nearly as threatening as those leading to loss of their living room. Farms used to have rough borders that were grounds for the plants monarchs love and live in. However, newly applied practices pushed crops to the edge of fields.

"Butterflies often have good and bad years. We do think there's potential to turn the situation around." Dr. Schultz said. And she said she saw two reasons for that. First, the population decline seen in 2017 ~ 2018 wasn't repeated last year. And second, she's seen butterfly populations recover before.