Vinegar is great. It makes salad, fries and dumplings taste better, and you can even clean your windows with it. And now, according to scientists, it may even help the planet’s population survive climate change.

Researchers from the RIKEN Center for Sustainable Resource Science (CSRS) in Japan have found that growing plants in vinegar makes them more resistant to droughts. This could mean that in the future, worries about climate change affecting the world’s supply of food will be much less.

The discovery was made after the researchers studied the Arabidopsis, a plant known for its ability to survive in dry weather. It was found that when the plant was placed in drought-like conditions, it produced a chemical called acetate(醋酸盐)—the main component of vinegar.

After discovering this, the scientists experimented further by adding acetate to the soil of other plants, and they stopped giving them water completely. After leaving the plants for 14 days, they found that the ones treated with acetate had survived, while the untreated plants had dried up and died. It’s hoped that this simple method of survival could soon be used to help farmers in dry countries keep their crops alive.

Jong Myong Kim, the co-author of the study, tells Popular Science that he’s already been in touch with people all over the world who are interested in trying this simple and cost-effective method out for themselves from flower growing companies to amateur gardeners. Although at this point keeping thirsty plants alive isn’t as easy as just pouring vinegar over them, Kim says he and his team are working on making the process as simple as possible. “Now we are trying to cooperate with some farmers, and also some companies, to make a method of applying this system,” he says.

And for those of us who always forget to ask our neighbors to water our plants when we go away, hopefully this means the end of returning home from a trip to find our favorite flowers have died.

What kind of amusing activities will you participate in during your life? Will you be spending your free time doing safe sports with little danger or will you always be one of the first people to try the next popular extreme activity? Scientists have been interested in finding out why some people seem to prefer dangerous activities.

Although there are exceptions, researchers have found that in most cases men are less cautious than women. Men often try to impress women by proving that they are courageous and fearless, and they are more likely to take risks when women are watching them or when they are competing against other men.

Research also shows that as people get older they usually behave more responsibly and avoid taking unnecessary risks. In addition, when people are in stable relationships, they seem to be less attracted to daring activities.

Some people seem to be more daring than others, but there are many different types of risks and some people take one type of risk, but not another. Psychologists have identified a number of categories of risk. These include financial risks, risks related to health and safety, amusing risks and social risks. Psychologists discover that some people will take risks in one area, but not in another. Just if a person enjoys bungee (蹦极) jumping, it doesn’t mean he or she will take chances when investing(投资) money or that he will tell a joke to a group of strangers.

Interestingly, research shows that women take more social risks than men. They are more likely to make career changes as they get older and to express unpopular opinions in business meetings.

Yet, at the end of the day, the likelihood of particular people taking a risk depends on their personalities. In general, optimistic people are more likely to take risks because they focus on the possible positive outcomes of their actions. On the other hand, those with opposite personality are much more likely to avoid taking a chance.

Scientists and marine biologists(海洋生物学家) had something to celebrate last week when two lost humpback whales(座头鲸) returned to the Pacific Ocean. Delta and Dawn — a mother and a baby — had circled the Sacramento Bay area for two weeks before going back to the ocean.

＂We all shouted loudly like ‘Yay’!＂said Jim Oswald, a spokesman for the Marine Mammal Center. ＂It’s been really exciting.＂

The humpback whales were last spotted on May 29 near the Golden Gate Bridge in San Francisco, California. Scientists are sure that the whales swam into open water during the evening of May 29 or early the next morning, since there have been no further sightings of the whales. Even so, boats were sent out to look for them, just in case the whales made another wrong turn.

Officials spent two weeks trying to get the whales to turn back towards the ocean. Biologists played recordings of whale-feeding as well as unfamiliar sounds to try to make the whales head back to the Pacific Ocean.

However, Delta and Dawn gave scientists an unexpected chance to study humpback whales in the wild. Scientists were able to gather sound recordings and watch their behaviors. This is especially exciting because humpback whales are an endangered species. What’s more, scientists don’t usually have the chance to observe (观察) them in their natural habitat.

＂All those things are very hard to get,＂ said Oswald,＂So what we are doing is filling up the knowledge blank on humpback whales in the wild. ＂ Scientists should be able to use this information to help other lost whales in the future.