It is true that summer is hot. But here is something to make your day easier. Are you prepared? Meet the new AirFreez— an alternative to traditional Air Conditioners that cools you just the same!

It is surprisingly easy to set up! You just need to plug it into a socket（插座）OR any USB port （it uses so little energy that it can even run off of a phone or laptop battery）.

Once you have done that, simply fill it with 20oz/0. 6L of cold tap water.

Now just press the power button and the instant cool air is here!

It is no larger than a lunchbox. It can be powered by a pocket solar panel（电池板）or battery pack and you probably have the world's first and most portable AC unit.

Bad sleepers are putting the AirFreez next to their beds at night. The relaxing blow of cool, clean air, the comforting soft night light and the quiet create the perfect sleeping conditions!

The price is just amazing. Most AC units cost at least $ 300+ AND you have to pay more to cover the expensive electricity bills each month. AirFreez costs less than $ 100 （actually $ 53 if you buy more than one here）.

●To make your air even cooler—add a bottle of cold tap water from your refrigerator or even ice!

●For a beautiful relaxing atmosphere—add a few drops of fragrant oils to the water!

Vacation in the U. S. usually means slower days, and no school teachers know, however, that vacation means students will likely fall behind, and forget things they learned during the year. Simon Vanderpool, a special education teacher in Lexington, Kentucky, decided to do something about it.

He started a program called Books and Barbers. Children go to the barber, choose a book and read out loud while the barber cuts their hair. The child gets a sticker and can take the book home. And there is an added bonus： money. The kids get paid to read.

Vanderpool says barber shops are places where kids can feel comfortable. “Once a student feels comfortable, that's whenever the brain opens up, and that they are able to start focusing on nothing but learning. ” Amir Shalash owns a barber shop. But he is doing more than cutting children's hair. He is listening to them read, and helping them with their reading.

Most of the children getting haircuts at barber shops are boys. Vanderpool's idea was to do more than just help them with reading and money. The teacher wants to help kids who are growing up in a home without a father liike he did. Also, I created the program in order to provide a positive mentor(指导者）for the kids that go into the barber shop, and are able to have someone that they can rely on and they can trust in, and just build a bond between the two of them. ” Shalash says he and his fellow barbers like being mentors.

“The biggest thing is that we try to influence as many kids as we can, and that was my whole intention of it. ”

Whales, like all mammals（哺乳动物）,need air, and come to the surface to breathe through a blowhole. A drone（无人机）that floats over the blowholes of humpback whales as they are making annual journey along Australia's east coast is being used by Australian scientists for collecting nasal mucus（鼻腔粘液）of whales.

Vanessa Pirotta, a biologist at Macquarie University says that nasal mucus indicates the health of the whale. “It is the biological mixture that you see as a whale takes a breath as it surfaces from the water，” she said. You can hear sounds of sharp breaths as a whale breathes because, after all, they are animals like you and I. So as they take a breath it is a lot of lung bacteria coming out from their lungs, which we can collect to provide a brief idea of whale health.

Australian researchers have attached a special dish that is used in scientific tests to a drone which flies through the whale's nasal mist. As a whale comes to take a breath—you can actually see it coming to the surface on really good weather days —the drone then lowers, the dish is then opened, collecting nasal mucus for later research.

The research could help to solve one of the secrets of another impressive creature of the deep —the Southern right whale. Its numbers have recovered on Australia's west coast since hunting became suppressed but its population on the eastern seaboard remains stubbornly low.

In the past, studies into whale health had to rely on examining whales that were either killed or those whales that had been trapped on a beach. Drones allow scientists to collect nasal mucus from free-swimming whales to gather information in a safe way.

Google previously announced successful tests of machine learning systems designed to assist doctors. In one case, Google reported AI had examined eye diseases with equal accuracy to doctors. Other tests showed that machine learning can be used to study large amounts of patient data to predict future medical events.

Now the company has published two new studies showing a high level of success in identifying metastatic breast cancer. Metastatic means that cancer has spread from its main area to other parts of the body. Metastatic breast cancer is one of the deadliest, causing about 90 percent of all breast cancer deaths worldwide.

In metastatic breast cancer patients, the cancer often travels to nearby lymph nodes(淋巴结). Usually doctors examine lymph node tissue under a microscope to see whether cancer is present. Google notes that previous studies have shown that up to one-fourth of metastatic lymph node classifications end up being changed after a second examination. In addition, studies show that small metastatic material can be missed up to 67 percent of the time when examinations happen under extreme time restrictions.

Google says it created a mathematical algorithm(算法). The algorithm, called Lymph Node Assistant, is trained to find characteristics of tissue affected by metastatic cancer. When the system examined tissue images(图像), it was able to differentiate between metastatic cancer and non-cancer 99 percent of the time. In addition, the Lymph Node Assistant is highly effective at finding the positions of the cancers. Some of these positions would be too small for doctors themselves to identify. The research also showed that the algorithm method can reduce the usual time needed to examine the disease by about 50 percent.

But Google makes clear the AI-based system is not meant to replace the work of medical professionals. Instead, it is designed to reduce the number of false identifications and help doctors work faster and more effectively.