It has been several weeks since we tookour daughter to college and she seems to be adjusting  well after a short period of homesickness.For us, though, it's another story. Like most parents, I love checking in on mychildren at night. But now she's gone, and I find nighttimes the hardest. Imiss her most at night.

    In my neighborhood, most of the parentswhose kids are off to college are dealing with similar melancholy. Myhusband is filled with anxiety. One friend talked about getting this sickfeeling in her stomach as she prepared for the college drop-off. We complainedthat many of us were too busy to truly enjoy being with our children while wehad them.

    For us moms, seeing Toy Story 3 onlymade the sadness worse as we watched the character Andy, who is the same age asour kids, say goodbye to his childhood as he prepares to leave for college. Andit's not just “first-time” parents like me. Two moms who have kids already wellinto college said the separation didn't get any easier. “You feel likesomething has been taken away from inside you,” said one of them.

    I imagine things will get easier withtime, especially as I see my daughter adjust to college life. Meanwhile, as Ikeep my cell phone close to me in bed and text my daughter goodnight and sweetdreams every night, I like to think at messages serve as a night light thatkeeps her safe.

    The Healthy Habits Survey shows that only about one third of American seniors have correct habits . Here are some findings and expert advice.

    More than seven hundred years ago, the Prince of Wales had a very big and brave dog called Gelert.

    One day the Prince wanted to go hunting with his men. He told his dog to stay at home and look after his baby son. The baby was in a wooden cradle, which was like a small bed.

    When the Prince came back from hunting, Gelert ran out to meet his master. He wagged his tail and jumped up to put his paws on the Prince's chest. Then the Prince saw the blood on Gelert's jaws and head.

    "What have you done?" the Prince said. He rushed into his house and looked for his baby son. The cradle was lying on its side on the floor. The clothes were torn and there was blood on them.

    "So you have killed my son?" the Prince said angrily. "You unfaithful dog!" He took out his sword and killed the dog. Just as Gelert was dying, he managed to bark. Then the Prince heard a baby call to the dog.

    The Prince ran out of the house and saw his son lying on the ground unhurt. Near him was a dead wolf. Then the Prince knew that Gelert had defended the baby and killed the wolf.

    The Prince ran back into the house but he was too late. Gelert was dead. The Prince was very sad indeed. Tears ran down his face when he realized he had killed his faithful friend. The Prince carried the body of his brave dog to the top of a mountain and buried him there. After this, the Prince never smiled again. Every morning at dawn, he walked up the mountain and stood by the dog's grave for a few minutes.

    If you go to Mount Snowdon in Wales, people will show you where Gelert is buried. There is a sign by his grave. It reminds people of a brave and faithful dog.

    Three-day－old Oskar Lunde sleeps in a small bed at an Estonian(爱沙尼亚) hospital.

    Across the room, his father turns on a laptop computer. "Now we will register our child, "Andrei Lunde says as he lifts his identification card into the card reader. His wife, Olga, looks on. And just like that, Oskar is Estonia's newest citizen. No paper. No time spent standing in a line.

    Estonia has launched a project to make government administration completely digital. The goal is to reduce the size of the government work force, open up the decision-making process and fuel economic growth.

    Need medicine? Reach for a computer and send an email or text message to a doctor. Need help from the local government? Click on a link to the government websites…

    Estonia has created a system that supports electronic authentication(身份验证) and digital signatures. It provides paperless communications for both the government and private industry.

    However, there are a few things that one cannot do electronically in Estonia: marry, end a marriage or buy and sell property. That is only because the government has decided it is very important to show up in person for some big life events. When Estonia declared independence from the former Soviet Union in 1991, it had to build a new economy. Government leaders looked for an industry where the country could compete. They decided on information technology and the Internet.

    When the poor country needed to replace a 1930s phone system, former President Toomas Hendrik Ilves rejected the offer of a free analog(模拟) system from Finland and argued for a digital one.

    Last year, information and communications made up 5.9 percent of the economy. The government hopes to increase that figure with an "e-residency" program that lets businessmen around the world register their businesses in Estonia, thus gaining a presence in the European Union. More than 51, 000 people from 167 countries have registered at a cost of only 100 euros, or＄114 each.

    Join the ranks of bright travelers and load up your smart phone with these must-have travel apps.

    Sky Scanner

    Stop wasting precious time clicking through website after website for airfare deals. Searching over 1,000 airlines and travel agents, Sky Scanner locates the cheapest dates to fly as well as the most affordable destinations. Got your heart set on some place special? Just enter your destination, dates, and the number of travelers and the app does all the heavy lifting for you.

    Easy Travel

    Just enter your city, or postal code into the search window, and Easy Travel will display the cheapest gas being served up near you. Whether you're driving in Canada, or the United States, Easy Travel is by your side helping you save money.

    Bother Free

    Don't be lost in translation. Here's an app that will serve as your travel translator, translating over 60 languages for your communication pleasure. It's easy! Just select the language you want to learn, speak or type a phrase into your phone, and the app will deliver a translation that you can read and hear.

    World Atlas

    You can have the whole world in your hands! National Geographic's beautiful award-winning World Atlas app is a must-have for armchair travelers and globetrotters alike. Spin, expand, and zoom the 3D globe to access detailed maps, tools to measure distances and need-to-know facts such as current weather, demographics and currency.

Crocodiles today look very similar to ones from 200 million years ago. There are also very few species alive today—just 25. Other animals such as lizards (蜥蜴) and birds have achieved a diversity of many thousands of species in the same amount of time or less.

Prehistory also saw types of crocodile we don't see today, including giants as big as dinosaurs, plant-eaters, fast runners and snake-like forms that lived in the sea. The rate of their evolution is generally slow, but occasionally they evolve more quickly because the environment has changed. In particular, their evolution speeds up when the climate is warmer, and their body size increases.

The body size of crocodiles is important because it interacts with how fast animals grow, how much food they need, how big their populations are and how likely they are to become extinct. The limited diversity of crocodiles and their apparent lack of evolution is a result of a slow evolutionary rate. It seems the crocodiles arrived at a body plan that was very efficient and perfect enough that they didn't need to change it in order to survive. This perfection could be one explanation why crocodiles survived Cretaceous period (白垩纪), in which the dinosaurs died out.

Crocodiles generally develop better in warm conditions because they cannot control their body temperature and require warmth from the environment. The climate during the age of dinosaurs was warmer than it is today, and that may explain why there were many more varieties of crocodiles than we see now. Being able to draw energy from the sun means they do not need to eat as much as a warm-blooded animal like a bird or a mammal (哺乳动物).