Smart phones are so common these days. It's a wonder that our pets don't own one. But they don't necessarily have to. These four apps will help you take care of your best furry friend from dog training to first aid.

Pet First Aid

Price: $3.99

    Pet First Aid helps you provide the basic care and attention that your four-legged friend might need in a medical emergency. The application shows owners how to treat illnesses with helpful videos, pictures and articles on subjects like cuts, wound treatment and more. A section called Pet Info lets you enter in information about your pets including when they had their last vaccinations, any medicines they take, or information about any diseases or conditions your animal suffers from.

Paw Card Pet Tracker

Price: Free

    Paw Card helps you keep a record of your loved one's important information. Use it to record your pet's medical contacts, vaccinations, identity cards, medical conditions and medicines. Additional characteristics include a drawing showing your dog's weight over time.

Dog Park Finder

Price: Free

    Dog Park Finder helps you locate dog-friendly parks and training locations in your area(USA)locations only). The app includes in formation on more than 2,200 off-leash(无需给狗拴链的) areas, user photos and more than 6，500 reviews, so you can have fun with your dog off the leash.

Dog Book

Price: Free

    Dog Book is a social networking application for dogs. Like Face book, users can share with other people what's going on in their dog's life, share photos, and find great animal-friendly places to meet up.

    People born in winter are more likely to suffer mental health disorders, according to a recent study carried out by researchers at Vanderbilt University in Tennessee.

    Researchers raised baby mice from birth to weaning (断奶) in either “summer” light cycles of 16 hours of light and 8 hours of dark or “winter” cycles of 8 hours of light and 16 hours of dark. A third group experienced 12 hours of light and 12 hours of dark a day.

    Then half the winter mice stayed in a winter cycle, while half switched to a summer schedule. The summer mice were similarly split. The mice raised in equal periods of light and dark were split into three groups, one of which stayed on the 12­hour schedule, one of which joined the winter group, and one of which joined the summer group.

    After 28 days, it turns out the summer­born mice behaved the same whether they stayed on the summer cycle or switched to winter. But among the winter­born mice, those stayed in winter kept their previous schedule, while those that switched to summer stayed active for an extra hour and a half, which indicates that mice born and weaned in a winter light cycle showed dramatic disruptions（破坏） in their biological clocks.

    The finding is the first of its kind in mammals, and it could explain why people born in winter are at higher risk for mental health disorders.

    “We know that the biological clock regulates(管理) mood in humans,” said study researcher McMahon. “If the mechanism (机制) similar to the one that we found in mice operates in humans, then it could not only have an effect on a number of behavioral disorders, but also have a more general effect on personality.”

    In 1941, science fiction writer Isaac Asimov stated the Three Laws of Robotics. These laws come from the world of science fiction, but the real world is catching up. A law firm gave Pittsburgh's Carnegie Mellon University $10 million to explore artificial intelligence. Peter Kalis, chairman of the law firm, K&L Gates, said the development of technology had led to questions that were never taken seriously before. What will happen when you make robots that are smart, independent thinkers and then try to limit their freedom?

    Researcher Kalis said, “One expert said we'll be at a point when we give an instruction to our robot to go to work in the morning and it turns around and says, 'I'd rather go to the beach.'” He said that one day we would want laws to keep our free-thinking robots from running wild.

    With the law firm's gift, the university will be able to explore problems now appearing within automated industries. “Take driverless cars for example,” Kalis said. “If there's an accident concerned with a driverless car, what policies do we have in place? What kind of insurance policies do they have?” In fact, people can take a ride in a driverless car in Pittsburgh where an American online transportation network company uses the city as a testing ground for the company's driverless cars.

    The problems go beyond self-driving cars and robots. Think about the next generation of smartphones, those chips fixed in televisions, computers, fridges, etc., and the ever-expanding collection of personal data being stored in the “cloud”. So can Asimov's Three Laws of Robotics be used in reality? Is it necessary to have a moral guideline that everyone can understand? Whatever it is, doing no harm should be the very first one.

    That woman carried a new blanket (毛毯) over her arm. Wordlessly, she gave it to me.

    “Is it finished?” I asked.

    She shook her head. “No. It is ready,” she replied. I handed her the money and took the blanket.

    “It is beautiful, so skillfully woven (编织),” I said to my mother. “But what did she mean when she said it was not finished? How can it be ready if it is not finished?”

    “I will tell you later,” my mother said, “but first I will take you to the Navajo village.”

    We went down to the village. A group of young men were making sand pictures. We walked through the whole village, watching the different things the people were doing.

    It was not until that evening that my mother finally explained the Navajo woman's words.

    “Did you notice anything about the things the people were making?” my mother asked.

    “What should I have noticed?” I looked at her and asked.

    “Each thing the Navajo make has one small part that is not complete. The designs (设计) in their sand pictures are often not perfectly done, for example —the line of a circle may not quite close. If you look carefully at your blanket, you will probably find a stitch (一针) missing.”

    I took the blanket off, but it looked as perfect as any design could be. Then suddenly, I noticed that sure enough a stitch was missing!

    “But why do the Navajo intentionally leave some tiny part unfinished?” I asked.

    “They believe that when anything is completed or finished, it means the end has come — it will not be perfect until then. Then too, with a circle, they believe that they must leave a pathway for the bad spirits to run away and the good spirits to come in. So, often, they do not make the line close.”

    A voyaging ship was wrecked during a storm at sea and only two of the men aboard were able to swim to a small, desert-like island. Not knowing what else to do, the two survivors agreed that they had no alternative than to pray to God.

    However, to find out whose prayers were more powerful, they agreed to divide the territory between them and stay on opposite sides of the island.

    The first thing they prayed for was food. The next morning, the first man saw a fruit-bearing tree on his side of the island, and he was able to eat its fruit. But the other man's parcel of land remained barren.

    After a week, the first man became lonely and decided to pray for a wife. The next day, another ship was wrecked and the only survivor was a woman who swam to his side of the island. But on the other side of the island, there was nothing.

    Soon thereafter the first man prayed for a house, clothes and more food. The next day, like magic, all of these things were given to him. However, the second man still had nothing.

    Finally, the first man prayed for a ship so that he and his wife could leave the island, and in the morning he found a ship docked at his side of the island.

    The first man boarded the ship with his wife and decided to leave the second man on the island, considering the other man unworthy to receive God's blessings since none of his prayers had been answered.

    As the ship was about to leave, the first man heard a voice from Heaven booming, "Why are you leaving your companion on the island?"

    "My blessings are mine alone since I was the one who prayed for them," the first man answered. "His prayers were all unanswered and so he doesn't deserve anything."

    "You are mistaken!" the voice rebuked him. "He had only one prayer, which I answered. If not for that, you would not have received any of my blessings."

    "Tell me," the first man asked the voice, "what did he pray for that I should owe him anything?"

    "He prayed that all your prayers would be answered."

    For all we know, our blessings are not the fruits of our prayers alone, but those of another praying for us. So what you do for others is more important than what you do for yourself.