It was dawn of March 21, 2018. Gary Messina was on his morning run along New York City'8East River. Suddenly something caught his eye—a large 60-year-old man balancing on the four-foot-high fence that guarded the path from the water. As Messina got closer to the scene, the man took a step forward and slipped into the dark river below.

    When Messina reached nearer, the man was struggling in the water, clearly unable to swim. Other joggers also heard the man's cry. David Blauzvern and John Green dropped their phones and keys on land and jumped in. “ People had called the police, but it was unclear when they'd get there,” says Green. “We just reacted. Messina joined them in the river. Just as the jumper was losing strength, Blauzvern take hold of him. The pair were about 30 yards from the seawall when Messina and Green caught up to them. They seized the man, with Blauzvern supporting his back and Messina and Green holding him up from either side. As the men made their way toward the concrete seawall that stretched for blocks in each direction, Blauzvern had an awful realization:there was no way out of the river.

    By now, a crowd had gathered on land. “A rescue boat is on its way, someone yelled to them. Swimming forward was getting tougher by the minute. The jumper, who was six foot two and weighed around 260 pounds, was heavy in his rescuers' arms. After ten minutes, they managed to get to the river's edge. “I've never been so out of breath, ”says Blauzvern.

    Fifteen minutes after the men had jumped into the river, the two-man rescue boat appeared. But because it couldn't risk getting too close to the seawall, the men had to swim out to it. “I was completely out of energy at this point, “says Blauzver. The men in the water pushed the jumper while the men in the boat pulled him up and, finally, to safety. The man they had saved was taken to the hospital for evaluation(评估). Details on his condition have not been released. As for the rescuers, each of them was at work by 10:30a. m. “I was a bit late,” admits Blauzvern, smiling. “But I had a good excuse.”

    Every year on April 1, April Fools' Day is celebrated in many countries around the world. In France, it's called "Poisson d' Avril" or "Fish of April." In Scotland, the holiday is often called "Gowkie Day." In Iraq, the holiday is called Kithbet Neesan or "April Lie."

    History experts say people have celebrated April Fools' Day for a long time. Some believe the tradition comes from the ancient Romans more than two thousand years ago. It was a day of playing games and pretending to be someone else.

    Others say the day for fooling began in France in 1564, when King Charles changed the yearly calendar. He moved New Year's Day from April 1 to January 1. Many people did not know about the change because of communication problems back then. Some people continued to celebrate New Year's Day on April 1. Other people called them April Fools and played jokes on them.

    In the United States, April Fools' Day is just a day of joking and playing tricks on friends. These kinds of jokes are also called pranks. These jokes typically end in the prankster shouting "April Fools'!"

    Simple pranks, like telling a friend a funny lie or making prank phone calls, are still common. But, major companies also get in on April Fools' Day fun in a much bigger way. A few years ago, on April 1, Starbucks announced it was introducing new coffee cup sizes -- Plenta and Micra. The very large cups, bigger than a human head, remained useful for customers even after finishing all that coffee. According to Starbucks, the cups could be used as a rain hat, a pot for plants, or a lampshade.

    It did not take long for customers to catch on to the prank! More and more people use social media or smart phone apps to play pranks on their friends on April Fools' Day. One very annoying smart phone app, Cat Facts, sends funny facts about cats to your friends' phones, every day.

    Babies teach their older brothers and sisters empathy (移情), according to a new research. Empathy means understanding and entering others' feelings. Until now, younger kids have generally been regarded to learn plenty from their older brothers or sisters but don't give back much. But this study, published in Child Development, confirms that younger siblings (兄弟姐妹) ensure their big brothers and sisters don't grow into disgusting people—no easy task.

    “Although it's assumed that older siblings and parents are the primary socializing influences on younger siblings' development but not vice versa, we found that both younger and older siblings positively contributed to each other's empathy over time,” study co-author Marc Jambon said in a statement. Prior sibling studies have focused on the influence of older brothers and sisters, probably because their impact is most obvious. As one review of literature notes, studies have shown that older siblings influence everything from their younger siblings' motor development to their risk of smoking later in life. And although separated studies have tried to pin down effects that younger siblings have on their older siblings, the influence of baby brothers and sisters remains unclear.

    For this new study, Jambon and his colleagues recruited (招募) a diverse group of 452 Canadian sibling pairs between the ages of 18 months and four years. At the start of the study, individual researchers assessed children's baseline empathy levels by visiting the kids at home and then pretending to hurt themselves or break a valuable item. Eighteen months later, they found small but significant increases in empathy.

    One unexpected exception—older sisters did not appear to experience increased empathy after 18 months living with their little brothers, specifically. The researchers aren't sure why this exception appeared, and they recommend that future studies dive into more complex phenomena.

New York Walking Tour

    Statue of Liberty and Ellis Island Walking Tour

    Start this exciting guided 4-hour tour by getting early Reserve Line Access boarding on the ferry to Liberty Island. Once there, go inside the base of the statue and head to the observation decks for an awesome view of New York City and its surroundings. Then come back on the ferry to Ellis Island to learn about the history of immigration(移民)to America that took place here between 1892 and 1954.

    Central Park Walking Tour

    Walk through Central Park's most picturesque highlights on a 2-hour tour with a professional photographer. Remember your New York City adventure with unforgettable images of you with family or friends as you circle the towers at Belvedere Castle, walk through paths with flowers in the Conservatory Garden, or feed the swans by the Loeb Boathouse.

    New York City Architecture Walking Tour

    Learn about the history of the buildings that define the New York City skyline on a 3-hour walking architecture tour. Walk down the famous 42nd Street corridor with a longtime New York resident(居民)and architectural expert, stopping along the way to learn about Midtown Manhattan's most iconic structures like the Chrysler Building, Ford Foundation, Grand Central Station and the New York Public Library.

    Greenwich Village Walking Tour

    Greenwich Village is one of New York City's most beautiful and famous neighborhoods. Take a guided 2-hour walking tour of this legendary Lower Manhattan space. Hear about the famous artists who once lived here, from Edgar Allan Poe to Bob Dylan, Jimi Hendrix and countless others. Walk the winding streets and visit popular Washington Square Park, reliving more than 200 years of history.

    America is the world's largest food exporter. But the worst drought in half a century is hitting corn and wheat harvests. The drought across the central United States adds to concerns about world food supplies and prices in the coming years.

    Experts say by 2050, the world will have to produce at least sixty percent more food to feed a population growing bigger and bigger. China, a major food importer, is looking for producers around the world to guarantee future food supplies.

    China has invested in food production in Australia and New Zealand. A new source of supply is Ukraine. Ukraine was known as the breadbasket of Europe because of rich corn and wheat harvests a century ago.

    Galyna Kovtok is chief executive of Ukraine's largest agricultural business, ULF. She predicts that within a few months her company will be approved to export corn to China. That will make Ukraine the first country outside the Americas to do so.

    ULF will soon have almost two million tons of elevator storage capacity as it prepares for the Chinese market. Chinese money is financing the building of six grain elevators. But the company's equipment is largely American, including half-million-dollar John Deere combines to harvest wheat.

    ULF'S grain production per hectare (公顷) is now halfway between Ukrainian averages and the high yields of the American Midwest. But farming depends on the weather. Across the Black Sea region—in Ukraine, Russia and Kazakhstan--drought this year is pushing harvests down by fifteen to twenty percent.

    Traditionally, the Black Sea region is the main source of wheat for North Africa and the Middle East. But this year, on the supply side, Russia may have to stop exports. And, on the demand side, Africa and the Middle East are now competing with China.

    At the same time, a new report says large parts of Asia may face long periods of severe drought within ten years. It says northern China, India, Afghanistan, Mongolia and Pakistan will be especially hard hit. It says other parts of Asia are likely to face longer and wetter monsoon seasons (雨季) because of climate change.