Try this: For an entire day, forget about the clock. Eat when you're hungry and sleep when you're tired. What do you think will happen?

    You may be surprised to find that your day is much like most other days. You'll probably get hungry when you normally eat and tired when you normally sleep. Even though you don't know what time it is, your body does.

    These patterns of daily life are called circadian rhythms, and they are more than just habits. Inside our bodies are several clocklike systems that follow a roughly 24-hour cycle. Throughout the day and night, our internal clocks direct changes in temperature, body chemicals, hunger, sleepiness and more.

    Everyone's rhythms are unique, which is why you might like to stay up late while your sister always wants to go to bed early. But overall, everyone is programmed to feel tired at night and energetic during the day.

    Scientists have known for a long time that the light of day and the dark of night play important roles in setting our internal（内部的） clocks. Now, new discoveries are giving scientists insights into how these clocks work.

    Learning about our body clocks may help scientists understand why problems arise when we act out of step with our circadian rhythms. For example, traveling across time zones can make people wake up in the middle of the night. Regularly staying up late can make kids do worse on tests and quizzes. And working shifts at night leads to higher rates of heart disease, diabetes and obesity.

    “There is a growing sense that when we eat and when we sleep are important parts of how healthy we are,” says Steven Shea, Director of the Sleep Disorders Research Program at Brigham and Women's Hospital in Boston.

    Scientists still aren't sure why the timing of sleep matters so much, Shea says. But research findings suggest that our circadian rhythms are more important than we give them credit for.

    “During the night, we are prepared to sleep,” Shea says. “During the day, we are prepared to eat and move around. If you reverse (颠倒)what you are doing, everything is out of phase. That can have unfavorable consequences.”

    Some people think that success is only for those with talent or those who grow up in the right family, and others believe that success mostly comes down to luck. I'm not going to say luck, talent, and circumstances don't come into play because they do. Some people are born into the right family while others are born with great intelligence, and that's just the reality of how life is.

    However, to succeed in life, one first needs to set a goal and then gradually make it more practical. And, in addition to that, in order to get really good at something, one needs to spend at least 10,000 hours studying and practicing. To become great at certain things, it'll require even more time, time that most people won't put in.

    This is a big reason why many successful people advise you to do something you love. If you don't enjoy what you do, it is going to feel like unbearable pain and will likely make you quit well before you ever become good at it.

    When you see people exhibiting some great skills or having achieved great success, you know that they have put in a huge part of their life to get there at a huge cost. It's sometimes easy to think they got lucky or they were born with some rare talent, but thinking that way does you no good, and there's a huge chance that you're wrong anyway.

    Whatever you do, if you want to become great at it, you need to work day in and day out, almost to the point of addiction, and over a long period of time. If you're not willing to put in the time and work, don't expect to receive any rewards. Consistent, hard work won't guarantee you the level of success you may want, but it will guarantee that you will become really good at whatever it is you put all that work into.

    "Cleverness is a gift while kindness is a choice. Gifts are easy – they're given after all. Choices can be hard." –– Jeff Bezos.

    I got the idea to start Amazon 16 years ago. I came across the fact that the Internet usage was growing at 2,300 percent per year. I'd never seen or heard of anything that grew that fast, and the idea of building an online bookstore with millions of titles was very exciting to me. I had just turned 30 years old, and I'd been married for a year. I told my wife MacKenzie that I wanted to quit my job and go to do this crazy thing that probably wouldn't work since most start-ups don't, and I wasn't sure what to expect. MacKenzie told me I should go for it. As a young boy, I'd been a garage inventor. I'd always wanted to be an inventor, and she wanted me to follow my passion.

    I was working at a financial firm in New York City with a bunch of very smart people, and I had a brilliant boss that I much admired. I went to my boss and told him I wanted to start a company selling books on the Internet. He took me on a long walk in Central Park, listened carefully to me, and finally said, "That sounds like a really good idea, but it would be an even better idea for someone who didn't already have a good job." That logic made some sense to me, and he persuaded me to think about it for 48 hours before making a final decision. Seen in that light, it really was a difficult choice, but finally, I decided I had to give it a shot. I didn't think I'd regret trying and failing. And I believed I would always be haunted(萦绕)by a decision to not try at all.

    After much consideration, I took the less safe path to follow my passion, and I'm proud of that choice. For all of us, in the end, we are our choices.

    October might seem to be pumpkin month in the U.S. The holiday of Halloween (万圣节) comes on October 31. Americans around the country are already using social media to show off their pumpkin growing and carving skills.

    Pumpkins are round, orange fruits related to squashes (南瓜小果) and gourds (葫芦). People use their flesh and seeds for food, but they are also popular decorations in the fall.

    Two big pumpkins recently made headlines in the U.S. A farmer in the northeastern state of Rhode Island broke the record for the largest pumpkin ever grown in North America. Richard Wallace's pumpkin weighed 1,026 kilograms. It broke his son's record from 2015. Ron Wallace's pumpkin only weighed 1,011 kilograms last year. A schoolteacher in the northwestern state of Washington brought her large pumpkin to an event in California. Her pumpkin was the champion, weighing 866 kilograms. It turns out that Cindy Tobeck's pumpkin grew from one of the seeds from Ron Wallace's pumpkin from 2015.

    While those pumpkins are large, they are still not the largest in the world. According to the website BigPumpkins.com, Richard Wallace's pumpkin is only the second-heaviest pumpkin of the year. A man in Belgium produced a pumpkin that weighed almost 1,200 kilograms. Smithsonian magazine wrote a story about people who try to grow large pumpkins. In 35 years, the size of record pumpkins has grown from about 225 kilograms to over 1,000 kilograms. Pumpkin farmers trying to grow record fruits are taking the seeds of champion pumpkins from one year and breeding them with other large pumpkins.

    But people are not just growing pumpkins. They are carving them, too. One Twitter user from Britain recently posted a photo of a pumpkin designed to look like U.S. presidential candidate Donald Trump. No word of a Hillary Clinton pumpkin design. But one pumpkin farmer in California allows visitors to shoot small pumpkins out of a cannon（大炮）. The targets? Large paper cut-outs of both Trump and Clinton.

    The following list includes some books that come highly recommended by millions of readers and also a short summary of the highlights of each work.

    The Go-Giver, by Bob Burg and John David Man

    I didn't even expect that such a short book could make a huge difference in my way towards life. It simply explains complex laws that direct mankind, and concludes that there is always truth in the opposite.

    Dao De Jing, by Laozi

    Dao De Jing is one of the finest books on philosophy written by Laozi, an ancient Chinese philosopher and poet. It is sincere, exciting and makes you think a lot. Read it and get in touch with the clear educative understandings that give you enough tips to pursue your life goal full of passion.

    The Science of Getting Rich, by Wallace D. Wattles

    I had my own misunderstandings of getting rich till I read this book. The book made a huge difference to my life after I discovered the secrets mentioned. Read it and it teaches you how to .become rich, not immediately, but step by step.

    The Power of Habit, by Charles Duhigg

    I never knew habits played such an important role in shaping our future until I read this book. It says, you are what your habits are, and also suggests the proven techniques to create new habits that change our lifestyles and eventually our lives. It is a must-read for everyone who wishes to form lifetime habits.

    The Road Less Travelled, by Scott Peck

    Simply put. Buy this book for the path towards understanding in a spiritual way that strengthens your personal growth. This book never gives you easy solutions to the challenges of life. It simply is part of life and leaves you with better understanding to lead a fulfilled life.

    With its snow-covered mountains and a variety of wildlife, Yellow Stone National Park is one of the scenic treasures of the United States. Located primarily in Wyoming, the park hosts millions of visitors every year. If you plan to travel within the park, keep in mind advice from the National Park Service.

    Seasonal Travel

    Travel varies vastly from season to season. Roads are generally open in the summer except for cases of rock or mud slides, wild fires, accidents or road construction. Early snows in the fall can cause some roads to close temporarily. In the winter almost all roads are closed to motor vehicles, but snowmobiles and other snow vehicles with tracks are allowed. Roads begin to open for the spring by the latter part of April but can close if snowfall continues.

    Driving Time

    Grand Loop is the main road through Yellowstone National Park; it passes by most of the major attractions. These include Old Faithful, Yellowstone Lake and the Grand Canyon of Yellowstone. The maximum speed limit on the Grand Loop is 45 miles per hour, but the speed limit drops during some of the winding and twisting sections of this narrow road. Allow yourself at least two days to fully travel the loop due to the size of the park and being sometimes stuck in heavy traffic.

    Safety Awareness

    Buffalo(水牛)often block the roads in the park as they move through the fields. If a group is traveling across the road you are on  you can either wait for them to pass or find an alternative route. If you get out of your vehicle, the National Park Service says to stay at least 25 yards from any buffalo (and 100 yards or more away from bears and wolves). Buffalo are particularly unpredictable and charge people at speeds up to 30 mph.

    You can take your bicycle on any public roads and routes designed for bikes, but bicycles are not allowed on the park roads which are narrow with few shoulders. Altitudes range from 5, 300 to 8, 860 feet. The National Park Service recommends cyclists wear helmets and noticeable clothing.