Have you ever had the strange feeling that you were being watched? You tum around and, sure enough, someone was looking right at you!

Parapsychologists(R y3)say that humans have a natural ability to sense when someone is looking at them. To research whether such a "six sense" really exists, Robert Baker, a psychologist(心理学家) at the University of Kentucky, did two experiments.

    In the first one, Baker sat behind unknowing people in public places and stared at the backs of their heads for 5 to 15 minutes. The subjects(受试者)were eating, drinking, reading, studying, watching TV, or working at a computer. Baker made sure that the people could not tell that he was sitting behind them during those periods. Later when he questioned the subjects, almost all them said they had no sense that someone was staring at them.

    For the second experiment, Baker told the subjects that they would be stared at from time to time from behind in a laboratory setting. The people had to write down when they felt they being stared at and when they weren't. Baker found the subjects were no better at telling when they were stared at and when they weren't.

    Baker concludes that people do not have the ability to sense when they are being stared at. If people doubt the outcome of his two experiments, said Baker," I suggest they repeat the experiments and see for themselves

Nowadays, "toilet revolution" is a thing in China.China isinvesting seven billion yuan in the project.The money is spent building or upgrading(改进) toilets in 30,000villages.

Experts have agreed that a "toilet revolution" is very important.Bettertoilets mean healthier lives and better living standards.Better toilets can alsohelp encourage tourism and improve the economy.

"Toilet revolution" was started in 2015.Chinese president Xi Jinpingthen called for improvement to toilets across China.The government has investedmore than 1.6 billion yuan in the project since then.Nearly 70,000 toilets havebeen built or upgraded.By the end of 2017, 45 percent of rural residents (居民) had been usingstandard toilets.In 2013, that number was only 36 percent.

In cities popular with tourists, more expensive toilets have been built.Thesetoilets have ATMs, Wi­Fi and recharging (充电) stations for mobile phones.Some toilets, meanwhile, havebeen expanded (扩大). Now, they have special cubicles (隔间) for the disabled and adults with young children.

China, in fact, is not alone in focusing on toilets.According to Bill Gates'foundation, forty percent of the world's population doesn't have flush toilets.UNICEF(联合国儿童基金会) says atleast 1.2 million young children die of diarrhea each year.Contact with human wasteis the main cause.Gates says toilets of the future will be able to save 800 livesevery day.

How do you find the street cats in your school? Cat food? At Beijing Foreign Studies University (BFSU), students made on their phone a mini-program(小程序) Beiwai Cats to help students find the cats in their school and get to know them. 

On Beiwai Cats, every cat on the eastern campus ( 东 校 园) of the university has an"ID card". The cards show the cats' photos with information(信息), like what the cats look like, where to find them, whether(是否) they like people. Cat lovers can even adopt the school cats to give them a home on Beiwai Cats. 

Zhou Hengxiao, 20, helped make the mini-program. He said it is good for both the students and the cats. With the"ID cards", students can learn more about the cats. If students know the cat is afraid of people, they will be more careful not to touch(触碰) it. So the cat may not get scared so often and the students are less likely to get scratched(被抓伤). 

Zhou's group are working on platforms like Weibo, Bilibili and Xiaohongshu to make more people know Beiwai Cats. "When we make money from these platforms, we can use the money to buy more food for the cats, "he said. 

Zhou said they hope to help more street cats on Beiwai Cats. "We don't have much money, but we want to do our best to give these small lives a home, "said Zhou. 

Tom and Tony are brothers. Tom exercises every day. He plays soccer five times a week and he swims and runs every weekend. He drinks milk and eats fruit and vegetables every day. He doesn't eat junk food. He sleeps eight hours every night.

Tony doesn't like to exercise, but he sometimes plays soccer with his brother. He really likes to watch TV. He watches TV for four or five hours every night. He never drinks milk, and he hardly ever eats fruit and vegetables. He loves junk food. He eats junk food five or six times a week. He often plays computer games, too. He sleeps eight hours every night.