Too Good To Go, an app operating in the UK, allows users to order leftover food at a discount from restaurants, according to the website. The goal is to help cut food waste.

    Users simply log in, pick a restaurant, pay through the app and then pick up their food at a set time—usually around closing or after peak meal times. Orders through the app cost between 2 British pounds ($2.60) to 3.80 British pounds (about $5). Users aren't able to pick the food items, but they get an idea of the type of food that will be available, according to Business Green.

    Users also have the option to give meals to people in need by donating 1 British pound or more through the app. More than l, l00 meals have been donated so far.

    To ensure the entire experience is super eco-friendly. Too Good To Go provides recyclable takeout packaging to participating restaurants.

    Restaurants using the app make extra money by selling food what would otherwisehave been throw away. And Too Good To Go itself makes money by taking a fee from participating restaurants on each sale.

    Founded in Denmark last year. Too Good To Go launched this year in the UK and is expanding to other countries. The app is available in Brighton, Birmingham, Manchester and Leeds, and will be in London later this month.

    “Food waste just seems like one of the dumbest(愚蠢) problems we have in this world,” co-founder James Crummie told Business Green. “The restaurant industry is wasting about 600,000 tonnes of food each year, and in the UK alone there are one million people on emergency food parcels from food banks. Why do we have these two massive social issues that are completely connected, yet there is not much going on to address them?”

    Too Good To Go has already helped cut a significant amount of waste. So far, the app has saved 600 meals from landfills in the UK, reports Business Green.

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    Do you want to have a nice place to spend your weekend？Here are some places for you ,which are probably a mere walk away from your college.

King's Art Centre

    A day at the Centre could mean a visit to an exhibition of the work of one of the most interesting contemporary artists on show anywhere. This weekend sees the opening of an exhibition of four local artists.

    You could attend a class teaching you how to 'learn from the masters' or get more creative with paint—free of charge.

    The Centre also runs two life drawing classes for which there is a small fee.

The Botanic Garden

    The Garden has over 8,000 plant species；it holds the research and teaching collection of living plants for Cambridge University.

    The multi­branched Torch Aloe here is impressive. The African plant produces red flowers above blue­green leaves，and is not one to miss.

    Get to the display house to see Dionaea muscipula，a plant more commonly known as the Venus Flytrap that feeds on insects and other small animals.

    The Garden is also a place for wildlife ­enthusiasts. Look for grass snakes in the lake. A snake called 'Hissing Sid' is regularly seen lying in the heat of the warm sun.

Byron's Pool

    Many stories surround Lord Byron's time as a student of Cambridge University. Arriving in 1805，he wrote a letter complaining that it was a place of “mess and drunkenness”．However，it seems as though Byron did manage to pass the time pleasantly enough. I'm not just talking about the pet bear he kept in his rooms.He spent a great deal of time walking in the village.

    It is also said that on occasion Byron swam naked by moonlight in the lake，which is now known as Byron's Pool. A couple of miles past Grantchester in the south Cambridgeshire countryside，the pool is surrounded by beautiful circular paths around the fields. The cries of invisible birds make the trip a lovely experience and on the way home you can drop into the village for afternoon tea. If you don't trust me，then perhaps you'll take it from Virginia Woolf—over a century after Byron，she reportedly took a trip to swim in the same pool.

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    Dreams can be familiar and strange, fantastical or boring, but some dreams might be connected to the mental processes that help us learn. In a recent study, scientists found a connection between nap time dreams and better memory in people who were learning a new skill.

    In the study, 99 college students between the ages of 18 and 30 each spent an hour on a computer, trying to get through a virtual maze (逃宫). The maze was difficult, and the study participants had to start in a different place each time they tried, making it even more difficult. They were also told to find a particular picture of a tree and remember where it was.

    For the first 90 minutes of a five - hour break, half of the participants stayed awake and half were told to take a short nap. Participants who stayed awake were asked to describe their thoughts. Participants who took a nap were asked about their dreams after sleep and they were awakened within a minute of sleep to describe their dreams.

    Stickgold, a neuroscientist, wanted to know what people were dreaming about when their eyes weren't moving during sleep.Four of the 50 people who slept said their dreams were connected to the maze. Some dreamed about the music that had been playing when they were working; others said they dreamed about seeing people in the maze. When these four people tried the computer maze again, they were able to find the tree faster than before their naps.

    Stickgold suggests the dream itself doesn't' help a person learn, it's the other way around. He suspects that the dream was caused by the brain processes associated with learning.

    All four of the people who dreamed about the task had done poorly the first time,which makes Stickgold wonder if the dreams show up when a person finds a new task particularly difficult. People who had other dreams, or people who didn't' take a nap, didn't show the same improvement.

    Amsterdam is a special city. There are many places you should not miss during your visit. Here is our list of the best.

Amsterdam canal ring

    The city old centre is formed from canal rings, which give you the feeling of space, freedom and peace. Walk through these canal streets or better — take a trip by renting a boat yourself. Another way to explore the Venice of the North is to take a ride on a bicycle. Any way you decide for - enjoy this city.

The National Maritime Museum

    The Maritime Museum is an attractive place to visit, especially with children. With many attractions in it, this colourful and enjoyable museum will help you understand the history of the Netherlands - a small nation which was one of the world's greatest sea powers.

Amsterdam Brown Cafe

    When you enter Amsterdam old cafes called Brown, at first it will seem too much from the past and too crowded, but the atmosphere is unique. Relax and watch - most of people around will be locals. Feel like one of them — the real Amsterdammers.

Civic Guards Gallery

    This gallery is filled with old paintings from the Dutch Golden Age. The exhibited canvas may be not always the masterpieces of art, but these group portraits of Amsterdam citizens and their wives are an exquisite (精致的) document of the Dutch civilization and culture centuries ago.

To avoid waiting lines we advise you to buy your tickets in advance online through our Amsterdam attractions and museums tickets webpage.

    Wetlands are ecosystems found in low, flat areas. Often they border ponds, rivers, lakes, and oceans. Wetlands include marshes, swamps, and bogs.

    No trees grow in a marsh, but there are lots of grassy plants. Ducks, turtles, and many different bugs (虫子) live there, too. Florida has the world's biggest freshwater marsh. The Everglades covers 4,000 square miles. The Everglades is not entirely fresh water, however. Near the sea the fresh water and salt water mix. Some plants and animals can live only in this brackish water.

    Saltwater marshes lie along the East Coast and the Gulf of Mexico. During high tide these marshes are under water. During low tide these marshes can be seen. The water rushes out, carrying bits of plants, dead animals, and minerals necessary for sea animals. Many plants and animals depend upon this ever-changing environment.

    Swamps are forested wetlands. Like marshes, they are often found near rivers or lakes and have mineral soil that drain very slowly. Unlike marshes, they have trees and bushes. Swamps have trees that grow with their roots underwater. But the trees will die if their roots stay underwater too long. Animals such as water snakes and frogs live in swamps.

    Bogs have damp, soft soil. So many dead plants have piled up that there is no longer any standing water. This rotting plant matter turns into peat (泥炭). In Ireland and Scotland peat is dried and burned to heat homes. Bog soil is useful for growing wild rice. Lots of insects live there.

    Most people do not find wetlands beautiful. But wetlands are important. Marshes and swamps store water, thus reducing the flooding a heavy rain can cause. About one-third of all of America's endangered plants and animals live in wetlands. Now laws protect some wetlands. More than a dozen wetlands in the US are refuges (保护区) and wildlife preserves.

    Hacking isn't just for computers and smartphones, According to a study published last week in the journal Science, scientists have found a way to hack a plant's genes in order to make it use sunlight more quickly. Someday, the results could increase the amount of food produced around the world.

    Photosynthesis（光合作用）is the word used to describe how plants use sunlight, water, and carbon dioxide to make their own food. Scientists who conducted the new study say this is a very slow process. Plants use less than 1 percent of the energy available to therm. But by hacking a plant's genes, the scientists were able to increase the amount of leaf growth on plants between 14 and 20 percent.

    "Specifically, scientists hacked the plant's protective system. Normally, this system is activated when a plant gets too much sunlight, "said scientist Krishna Niyogi, co-author of the study. When the plant senses the light, it gets rid of extra energy and creates more leaves. When the plant is in shade, the protective system is turned off, but the process is slow.

    Stephen Long is the lead author of the study. He compared a plant's protective system to light-adjusting glasses. When a person wears the glasses outside during the day, the lenses（镜片）darken and lighten depending on how sunny it is. Plants do the same thing, he said. But in plants the adjustment can take anywhere from 10 minutes to an hour. This makes it hard for plants to get the right amount of sunlight needed to create food.

    The new study sped up the process. By changing the plant's genes, the protective system turned on and off more quickly than normal. As a result, leaf growth on the plants scientists used in the study increased. Leaf growth in two plants increased by 20 percent, while leaf growth on a third plant increased by 14 percent. Scientists conducted the study on tobacco plants. But they think the genetic changes will produce the same results in corn and rice.