Most people agree that eating healthy food is important. But sometimes making good food choices can be tough. Now, there are apps that can help people learn about the food they eat to improve their diets.

Open Table

    Open Table helps people choose restaurants when they want to go out to eat. Open Table is a free service that shows users restaurant availability based on where and when they want to dine. Open Table users can also make reservations directly through the app or website.

Epicurious

    Epicurious is a free app and website to help users find recipes and become better cooks. The app has more than 30,000 recipes and can create a shopping list based on the ingredients in a recipe. The app rates recipes for popularity and other qualities and inform users about vegetables in season in different areas.

Happy Cow

    The Happy Cow app is made freely for Vegetarians. Users can search for vegetarian restaurants and stores around the world. The Happy Cow app is based on the Happy Cow website, where users can discover places nearby or search using keywords.

Local Eats

    Restaurant chains, like McDonalds, can be found almost anywhere a person might travel. But sometimes tourists want to eat like locals. The website and app Local Eats is designed for that, which can help you find local restaurants in major cities in the US and in other countries. It lists locally owned restaurants so users can try foods from that area.

Where Chefs Eat

    “Where Chefs Eat” is a 975-page book. Most people would not want to carry that around. But there is a much lighter app version of the same name for just one dollar. Six hundred chefs provide information on 3,000 restaurants around the world on the Where Chefs Eat app. Users can also search by region, chef, or restaurant name.

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Five years ago, David Smith wore an expensive suit to work every day. "I was a clothes addict(有瘾的人)," he jokes. "I used to carry a fresh suit to work with me, so I could change if my clothes got wrinkled(有褶皱的)." Today David wears casual clothes (便装) to the office. He hardly ever wears a necktie. "I am working harder than ever." David says, "and I need to feel comfortable."

More and more companies are allowing their office workers to wear casual clothes to work. In the United States, the change from formal to casual office wear has been gradual. In the early 1990s, many companies allowed their employees to wear casual clothes on Friday. This became known as "casual Friday". "What started out as an extra one-day-a-week benefit for employees has really become an everyday thing." said business consultant Maisly Jones.

Why have so many companies started allowing their employees to wear casual clothes? "One reason is that it's easier for a company to attract new employees if it has a casual dress code." "A lot of young people don't want to dress up for work," says Owen Black, the owner of a software company, "so it's hard to hire people if you have a conservative (保守的) dress code." Another reason is that people seem happier and more productive when they are wearing comfortable clothes. In a study conducted by Levi Company, 85 percent of employers said that they believe that casual dress improves employee morale (心境, 士气). Only 4 percent of employers said that casual dress has a negative influence on productivity. Supporters of casual office wear also argue that a casual dress code helps them save money. "Suits are expensive, if you have to wear one every day," one person said. "For the same amount of money, you can buy a lot more casual clothes."

    A “lost tribe” that reached America from Australia may have been the first Native Americans, according to a new theory.

    If proved by DNA evidence, the theory will break long established beliefs about the southerly migration of people who entered America across the Bering Strait, found it empty and occupied it.

    On this theory rests the belief of Native Americans to have been the first true Americans. They would be classified to the ranks of escapee, beaten to the New World by Aboriginals (土著人) in boats.

    To a European, this may seem like an academic argument, but to Americans it is a philosophical question about identity, Silvia Gonzales, of Liverpool University said.

    Her claims are based on skeletons found in the California Peninsula of Mexico that have skulls quite unlike the broad Mongolian features of Native Americans. These narrow-skulled people have more in common with southern Asians, Aboriginal Australians and people of the South Pacific Region.

    The bones, stored at the National Museum of Anthropology (人类学) in Mexico City, have been carbon-dated and one is 12,700 years old, which places it several thousand years before the arrival of people from the North. “We think there were several migration waves into the Americas at different times by different human groups,” Dr. Gonzales said. “The timing, route and point of origin of the first colonization of the Americas remains a most contentious topic in human evolution.”

    But comparisons based on skull shape are not considered conclusive by anthropologists, so a team of Mexican and British scientists, backed by the Natural Environment Research Council, has also attempted to take out DNA from the bones. Dr. Gonzales declined yesterday to say exactly what the results were, as they need to be checked, but indicated that they were consistent (一致) with an Australian origin.

    Sue Hendrickson is a self-taught fossil（化石）hunter. As a kid, Sue Hendrickson often walked with her head down. “People said, 'Look up. Smile!” she says. “Now, I realize I was born to look for things and just didn't know it.”

    Sue Hendrickson does more than look—she finds valuable things: Shipwrecks（沉船）with treasure, ancient sunken cities, and in 1990, she found Sue, the world's largest, most complete Tyrannosaurus rex（霸王龙）. Is Hendrickson lucky? Well, maybe. But she also knows how to look.

    “I limit the area where I'm going to look,” she says. No one knew the location of the sunken ship San Diego in the Philippines. For a year, Hendrickson and other researchers searched papers and sailors' diaries. “The descriptions of the ship's sailors led us to the wreck,” she says. The team also used a tool that can respond to metal. This tool found the San Diego. All the work paid off. The 400-year-old ship was complete, with valuable gold and silver coins.

    To find the dinosaur she calls “the biggest animal that ever walked on earth,” Hendrickson started with maps made to search for oil. What Hendrickson found was the largest and most complete T-rex found to date. The T-rex is 42 feet long with 200 bones! Because it is so complete, scientists were able to infer that Sue walked at about 6 miles per hour and did not run faster than 15 miles an hour. Before Sue was discovered, they thought T-rex was much faster. To learn more about T-rex Sue, go to the Field Museum in Chicago.

    There's plenty left to be found, Hendrickson says, including answers to mysterious such as how T-rex lived. “I tell kids that they need to grow up and work them out because all of us old persons haven't yet!”

    With all the recent concern about the environment, people want to see their money used to better the planet. Here are four well-known environmental organizations.

    World Wildlife Fund (WWF)

    The World Wildlife Fund is perhaps one of the best-known organizations for the protection of endangered species and their habitats around the world. They've been around for over 45 years. You can donate through their website worldwildlife.org, join their organization as a member, or adopt an animal through their online adoption center.

    National Geographic Society (NGS)

    National Geographic Society is well-known for their magazine and their specials on TV. The organization itself is one of the longest-running in the world—they've been around since 1888, focus on exploration and conservation of forests, oceans, habitats, species and societies. You chopse to donate through the website nationalgeographic.com，buy something at their online store, or order a magazine subscription.

    National Wildlife Federation (NWF)

Founded officially in 1937, the National Wildlife Federation tries to protect wildlife at all costs. In fact, they believe that having the public educated is the best way to help the environment—the more you know, the more you can protect the world we live in. Donations to the NWF can be made through their website nwf. org or through other options, like matching gifts, workplace giving, or memorial donations.

    Ecology Fund, com

    Set up in 1976，Ecology Fund, com is run on user clicks. Advertisers buy ad space on the site every time someone clicks. The money goes to buy endangered wilderness land to protect it from companies that would destroy it. So far, Ecology Fund, com has bought land in many areas. The best thing about this site is that you needn't donate any money—all you have to do is click.