2 . In nature, octopuses (章鱼) hunt mainly with their sense of touch, using their eight arms to feel out their environment for hidden creatures. Researchers at the University of Minnesota recently studied a different way octopuses hunt—when they identify prey (猎物) based on sight. The study findings show that the marine creatures are quite consistent and methodical in how they approach prey.

Lead researcher Trevor Wardill and his team placed California two-spot octopuses into water tanks, hiding them in caves where they would have one eye looking out. They then placed either fiddler crabs or white shrimp in the tanks to see how the octopuses would try to catch them, capturing the interactions on video. The crabs and shrimp behave differently when trying to escape from predators (捕猎者), so using both species gave the researchers an opportunity to see whether this led the octopuses to use a different arm for hunting depending on the prey.

Wardill’s team found that the octopuses almost always used the same arm to grab their prey. Specifically, the second arm from the middle of the octopuses’ body, on the same side of their body as the eye, caught the prey. If they needed more arms to grab prey, they would use the ones next to the second arm.

The octopuses also attacked differently depending on the prey. When faced with crabs, an octopus would move suddenly on top of the crab with its whole body. However, when catching shrimp, the octopuses would take one arm and reach out very slowly toward the shrimp, then grab it and latch (缠住) onto it with its other arms to pull it in.

Wardill and his team hope to do more research. They want to study the octopus’s brain as it attacks pre y to develop a better understanding of what role the creature’s nervous system plays in selecting the arms it uses.

4 . The Wampanoag language was not dead. To call it dead would be an insult to the ancestors who left it for future generations as a way to communicate-and a way to teach. But it was “unspoken” until linguist Jessie “Little Doe” Baird brought it back. Her project’s Wampanoag dictionary holds more than 11,000 entries.

Words on paper are not a language. A language lives through the people who speak it. So Baird founded the Wôpanâak Language Reclamation Project. She teaches community classes and family camps. Kids in grade school and high school have the opportunity to learn the language.

The Wampanoags have lived for 12,000 years in Massachusetts and parts of Rhode Island. When the Pilgrims (清教徒) met the first Indigenous people, those were the Wampanoags. The English settlers brought disease that killed thousands-an estimated two-thirds of the Wampanoag Nation died-as well as war and rules that fragmented (分裂) the tribes. There once were 69 tribes in the nation; now there are three. Baird is a citizen of the Mashpee tribe. Her ancestors left a key to their language. They translated the King James Bible into Wampanoag. They left hundreds of documents in their written alphabet (字母表).

Baird describes a vision she had where her ancestors helped her see it was time to bring the language home. She began her research, which led her to a graduate degree at Massachusetts Institute of Technology (MIT), where she learned from and worked with other linguists. In 2010, she was named a MacArthur Foundation Fellow, earning a “genius grant” to further her work.

“It’s incredibly difficult to reclaim a language, even more so when there are no speakers alive, and even more so when you’re driving 90 minutes a day, each way, to attend graduate school, with four small children at home.”

“I might have been afraid to do the work had I known that,” Baird says with a laugh now. “But I didn’t, and so here we are.”

5 . Imagine you’re out for an evening stroll (闲逛) in a foreign city, looking to find a restaurant for dinner. You will look for the busiest restaurant with the most diners because its popularity is bound to reflect on the quality of food and service. But is this true?

In tourist areas, which lack regular, local customers, the number of diners is unlikely to hold information about the quality of the meal. In this case, following the example of others could have led to a sub-optimal (次佳的) dinner choice in an overcrowded restaurant.

Spontaneously (不由自主地) copying other people’s thoughts or choices or simply going with the crowd is often referred to as “Herd behaviors”. It is a frequent occurrence among humans as well as many other animals, a common example being sheep.

Herding can appear to make a lot of sense. Average judgements of large groups of people often outperform individual choices. Furthermore, following the crowd appears to offer protection and comfort — after all, there’s “safety in numbers” — while helping to maintain a favourable reputation. Finally, following the herd reduces the effort needed to make a personal or unique decision.

Herd behaviors, while common and easy to explain, can have many harmful effects. Blindly following the herd can have grave consequences when trying to escape from danger. As seen in examples during earthquakes, herding may result in the entire crowd rushing for the same door, even if other exits are available. This unavoidably affects evacuation (撤退) efforts and may result in avoidable injuries or even deaths.

Psychology research suggests that it’s surprisingly difficult to resist the influences of the herd. In an experiment involving financial decision making, researchers found that warning messages about the potential errors of the crowd were surprisingly ineffective in helping customers make better choices. It appears there is no quick and easy fix. Instead, it is advisable to involve individuals adopting more critical approaches towards peers’ opinion, and questioning others’ behaviors as opposed to blindly following them.

9 . Anyone who’s lived through middle school knows those years can be particularly challenging. Some researches show youths across the U.S. are struggling with mental health. The physical health benefits of bike riding have been well-documented. Wilson, a researcher at Loma Linda University School of Medicine, and his co-authors carried out a new study to see if taking part in a cycling program could result in measurable changes in mind for teenagers.

The study involved more than 1,200 students, ages 11 to 14. Students participated in a cycling class for at least three days a week, for a period of 6 weeks. They learned cycling safety and practicing skills outdoors while raising their heart rate and just having fun. The students completed standardized questionnaires before and after the program designed to measure their health.

“We know cycling can benefit the body. Our research shows how it benefits the mind and social relationships as well. Bike riding can be an ideal activity for adolescents because of the benefits it offers,” said Wilson.

“Cycling engages several parts of brain function. You are looking at your hearing, you’re balancing, you’re navigating and turning. Oftentimes, you’re doing it with someone else, so there’s the positive effect of company or group activity,” said Allan Reiss, a professor at Stanford University School of Medicine.

While exercise has powerful mental health benefits, it’s not universal. For example, previous research has shown that teenage girls are at higher risk of mental health problems like depression and anxiety than boys. The current study found that, while middle school girls reported increased well-being after participating in the cycling program, that increase “may just reach the kind of baseline level for male students,” Wilson said. And other aspects of healthy living are also important, noted Wilson. The study found that teenagers who didn’t limit screen time to a maximum of two hours a day, or who got less than the recommended 8.5 hours of sleep, saw less improvement in their well-being, he said.

10 . If you’re feeling in the mood for grilled food but don’t have a barbecue, then deciding what product to purchase can be a bit difficult. So to help you get a better understanding of just some of the choices available, here’s our guide to buying a new BBQ.

The first decision is how your BBQ is going to be powered. There are essentially two main choices: the traditional way with charcoal, or the quick and convenient way with gas. For those who get frustrated with the process of lighting coals and waiting for them to reach the desired temperature, then gas is the easy option. It’s clean and gets up to temperature in an instant. But for many, the main fun of a barbecue lies in the back-to-basics cooking that hot coal brings natural barbecue fire. You’ll also find a far greater range of charcoal barbecues.

For anyone who likes to throw a garden party with a busy barbecue at the centre of the action, there are some vast grills (烤架) available. But unless you’re regularly feeding the masses, then these BBQ beasts can be impractical. Smaller meals are better suited to smaller equipment, so be realistic about the size that best suits you.

While facing the barbecue selection of your nearest retailer, you’ll notice that some of them have lids. These will usually be round and will make you pay more than the lidless options. But if you want the benefit of being able to cook larger items over a longer period of time, such as a whole chicken, then a lid will be essential.