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Today's topic is "Czech Republic's First 3D-Printed House Built in 48 Hours"

The Czech Republic's first 3D-printed house takes just 48 hours to build, a few weeks to dry, and is designed to last at least 100 years.

Designed by artist Michal Trpak with the support of a Czech building society, the first "Prvok" house has been built in the southern Czech city of Ceske Budejovice.

The Prvok house was designed with 43 square meters of floor space and three rooms: a bathroom, a living room with kitchen, and a bedroom. It can be used in both the city and countryside, and can even float on water.

According to the building society, 3D-printed houses can be built seven times faster than regular houses, and the costs can be up to 50% lower. Also, 3D-printing homes creates up to 20% less carbon dioxide than building with bricks.

The house uses environmentally friendly technologies like a shower that can collect, clean and reuse water, and a roof where plants can be grown. And even though it has been designed to last for a century, Trpak says that owners can demolish the house if they don't need it anymore, and print something new at the same place using the same materials.

The house was printed by a robot arm developed through one of Trpak's other projects, called Scoolpt. Working with global company Master Builders Solutions, Scoolpt also developed the concrete that the Prvok house is made of. After just one day, the concrete is as strong as the foundations of a normal family home — but after 28 days of drying, it is as strong as the concrete used to build bridges.

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Today's topic is "Balloon to Fly Tourists to Edge of Space"

Two companies, Space Perspective and PriestmanGoode, are working together to make a balloon that will fly passengers to the edge of space.

The balloon, known as Spaceship Neptune, will use hydrogen to float up over 30 kilometers, more than twice as high as a passenger plane. Below the balloon, there’s a capsule with seats for eight passengers and one pilot.

Nigel Goode, Designer and Co-Founder of PriestmanGoode, said that the companies want to make the journey as comfortable as possible for passengers. There’s a bar and a bathroom, plus large windows so passengers can see space and the Earth below. They’ll even be able to share the experience on social media while on board.

The journey will take six hours in total. It will take two hours for the balloon to float to the edge of space, where it will stay for two hours. It will then return to Earth and land in the ocean, where a boat will collect it.

Space Perspective says that it hopes the experience will be as easy as boarding a plane.

The first flights will leave from Space Perspective’s control center in Florida, but there are plans to have more flights from Hawaii, Alaska and possibly other places outside of the US.

The companies hope that the balloon will be used for experiments by scientists and for events like weddings, concerts and business meetings.

The first test flight is planned for early 2021, but won’t include any passengers. The companies hope to eventually offer up to 100 flights per year.

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Today's topic is "Japan's Fugaku Supercomputer is Helping Fight COVID-19"

Scientists around the world are trying to find effective treatments for COVID-19, and they're getting extra support from Fugaku, a Japanese supercomputer.

Fugaku — also another name for Mount Fuji — is kept in Kobe, Japan. Its installation began in December 2019, and even though it is not scheduled for full operation until 2021, it has been helping with coronavirus research since April 2020.

The supercomputer has identified dozens of possible treatments for COVID-19. Researchers from Kyoto University used it to run molecular-level simulations on 2,128 existing drugs. Over ten days, it looked for those that can bond with proteins associated with the novel coronavirus and inactivate them.

The dozens of drugs it identified include 12 that are already being tested around the world to treat the virus, but also a number that have not yet been looked at by scientists.

Research company Riken, which developed the supercomputer with Fujitsu, have also used it to model how the virus could travel through the air in different places. Findings from that study suggest that keeping the windows on commuter trains open and limiting the number of passengers could reduce the risk of infection.

Among the other research projects that could use Fugaku are those trying to find previously unknown characteristics of the still very new virus. The supercomputer could also be used to better understand the socio-economic impact of the pandemic, and contribute to countermeasures against the spread of the virus.

In June 2020, Fugaku was named the world's fastest supercomputer. It can perform 415 quadrillion computations a second, which is 2.8 times faster than the former fastest supercomputer, the Summit system from the US.

Fugaku is set to play a part in helping Japan achieve the goals in its Society 5.0 plan, which looks to use technology and data to balance economic growth with resolving social problems. Other than helping with medical science, it could be used to better predict natural disasters like earthquakes, or help with the development of clean energy.

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Today's topic is "Study: Young Children Are Using Apps Meant for Adults"

Some children as young as 3 years old use apps on mobile devices that are intended for adults, according to a study published in the journal Pediatrics.

The study used an app called Chronicle for Android devices, and screenshots of the battery page for Apple devices, to see app use information for 346 children aged 3 or 4. Of the 346 kids, 121, or about 35%, had their own device. The rest were using their parents' devices.

Parents were also asked how much time they thought their kids spent using the devices.

The study found that while some apps were age appropriate, others were gambling apps, like Cashman, or violent ones like Terrorist Shooter or Fortnite.

Many children also used "general audience" apps, like Cookie Jam and Candy Crush. Players can spend real money in these games, and children's privacy could be at risk because the apps may not restrict the data they collect or sell to advertising companies.

The study also found that most parents were wrong about how much time their kids spent using mobile devices. Fewer than 30% of parents estimated the time correctly. About 36% underestimated how much time their kids spent on their devices, and about 35% overestimated, with the parents' estimates being off by an average of more than an hour.

"Another interesting finding was how much YouTube dominated the viewing habits of so many 3- to 4-year-olds," said Dr. Jenny Radesky, the study's lead author. "Finally, we found a few kids with their own devices who had them running into the middle of the night — until 3 or 4 a.m. at times, usually [on] YouTube."

Other research has found that most kids are using devices with screens from infancy. There is also evidence that kids aged between 3 and 5 who have more than an hour a day of screen time without their parents involved have less brain development in the areas that control language and thinking skills.

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Today's topic is "Museum of Underwater Art Opens in Australia"

The new Museum of Underwater Art is now open in Australia’s Great Barrier Reef. The museum is two hours by boat from Townsville, Queensland, and is 18 meters below the ocean’s surface.

The museum features sculptures from British artist Jason deCaires Taylor. Taylor created the world's first underwater sculpture park in Grenada in 2006, and has made other underwater museums in Mexico and Spain.

The new museum hopes to get people thinking about climate change and protecting coral reefs. It is made out of material that helps new coral grow, and also provides a home for underwater wildlife.

The largest sculpture, Coral Greenhouse, weighs more than 58 metric tons and is the first underwater building by the artist. Inside, there are places for fish and other wildlife to live and hide, as well as 20 sculptures of children. Doorways allow divers to swim into the building.

Another sculpture, Ocean Siren, is just 30 meters from the Townsville coast. It is of an indigenous girl from the local community, and is the only sculpture in the museum that can be seen above the surface. Lights on the sculpture change color depending on the water temperature, showing the rising sea temperatures in the area.

The museum will create 182 jobs for the local community, and is expected to bring 50,000 visitors to Townsville each year. Several more sculptures will be added in 2021.

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Today's topic is "Uber Taxi Service Comes to Tokyo"

Uber is now offering taxis in Tokyo after six years of being in Japan.

People in Tokyo could already use the company's food delivery service, Uber Eats, and taxis could be booked with the Uber app in some other Japanese cities, including Kyoto, Osaka and Hiroshima.

Until now, people looking for a ride with Uber in Tokyo could only use its "Uber Black" service, which offers rides in luxury black cars driven by professional drivers for a higher price than a taxi.

But Uber is now working with three normal taxi businesses in Tokyo: Hinomaru Limousine Co., Tokyo MK Corp. and Ecosystem. Together, they are making 600 cars available in some of the city’s busiest areas.

However, Uber's car sharing services are still banned, because only professional drivers are allowed to carry paying customers in Japan. This means that people cannot sign up to be drivers with their own cars as they do in the US and other countries.

TimeOut writes that Uber Taxi will make it easier for non-Japanese speakers to get taxis in Tokyo. It will also let people share information about their journey with friends and family so they can know when they will arrive.

Japan is the second-largest taxi market in the world, according to Bloomberg. But most people still get a taxi by flagging one down on the street, and apps are used for less than 5% of the rides.

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Today's topic is "Foreign Students Must Leave US if Classes Go Online"

International students will be forced to leave the US or find a different college if their schools offer classes entirely online this fall.

The new guidelines from US Immigration and Customs Enforcement (ICE) put more pressure on universities to reopen despite concerns about the spread of COVID-19 among young adults.

Colleges were told the new rules on the day that many, including Harvard University, announced that all classes will be offered remotely.

Under the new rules, international students must take at least some of their classes in person. And new visas will not be given to students who want to study at schools that are entirely online.

The American Council on Education said the guidelines are "horrifying" and will result in confusion as schools look for ways to reopen safely.

One big concern is that students won’t be exempt from the rules even if an outbreak forces their school to go entirely online. It’s not clear what would happen to a student in that situation if they couldn’t travel to their home country either, said Terry Hartle, the council's senior vice president.

The international education group NAFSA criticized the rules and said schools should be given the authority to make decisions that are right for their own students. It said the guidelines are "harmful to international students" and that they "put the health and well-being ... of the entire higher education community at risk.”

President Donald Trump wants schools and colleges to return to in-person classes as soon as possible. Soon after the guidelines were released, Trump repeated on Twitter that schools must reopen, adding that Democrats want to keep schools closed "for political reasons, not for health reasons."

"They think it will help them in November. Wrong, the people get it!" Trump wrote, referring to the upcoming US presidential elections.

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Today's topic is "Japanese City Bans Phone Use While Walking"

The city of Yamato in Kanagawa prefecture has become the first city in Japan to ban the use of phones while walking.

Starting July 1, people in Yamato are no longer allowed to look at their smartphones while walking outside in public places, such as streets and parks. If they need to use their smartphones, pedestrians must move to the side and stop, making sure they are not in the way of vehicles or other pedestrians.

Although those who break the law will not be punished, city officials hope that the ban will make people think more about the dangers of walking while looking at their phones. Posters about the new rule will also be placed around the city.

"The number of people using smartphones has rapidly increased and so have the number of accidents," city official Masaaki Yasumi told AFP.

The new law was proposed after a January study which watched around 6,000 pedestrians in two different parts of the city. Researchers found that about 12% of pedestrians used smartphones while walking.

In 2014, researchers from Japanese cell phone company NTT Docomo used a computer to see what would happen if 1,500 people used Tokyo's Shibuya pedestrian crossing while looking at their phones. They found that only about one third of people would get to the other side of the street without hitting someone else, falling or dropping their phone.

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Today's topic is "Manta5 Unveils First E-Bike for the Water"

A company in New Zealand has developed an electric bicycle that can be used on water — the Manta5 Hydrofoil e-bike.

Manta5 describes its invention as half-bike and half-plane. The company says riding one feels like normal cycling, but on the water. It uses a battery, motor and underwater wings — which are called "foils" — to move across water at speeds of up to 20 kilometers an hour. The bikes are made to be strong, but still light enough to carry.

Manta5 was started in early 2011 by Guy Howard-Willis and Roland Alonzo, both passionate cyclists. Howard-Willis had wanted there to be more options for would-be water cyclists, and when he met Alonzo, decided to try and make that happen.

It took the company eight years to develop the bike, but it was able to show a prototype in 2017. The company says that a short video of that first bike got 350 million views on Facebook.

The first bikes that Manta5 produced sold out in six months. It says that riders in New Zealand are already fans, and are using them to ride across lakes, rivers and ocean waves.

Manta5 now hopes the bikes will become popular in the US as well. At $8,990, however, they certainly aren't cheap.

CEO Greg Johnston says that learning to ride the water bike is like cycling for the first time: you might have to try a few times, but it's a lot of fun once you get the hang of it. The company even believes that in the near future, biking across the water could be a sport, and even be included in the Olympics.

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Today's topic is "Russians Vote to Allow Putin to Rule Until 2036"

According to election officials, nearly 78% of Russian voters have approved a set of constitutional amendments that clear the way for President Vladimir Putin to rule Russia until 2036. Turnout across the country was said to be almost 68% over seven days of voting that concluded July 1.

The amendment that allows Putin to run for two more six-year terms after his current one expires in 2024 was part of a package of constitutional changes that also outlaw same-sex marriage, mention "a belief in God as a core value" and emphasize Russian law over international norms. Voters could not vote on the individual amendments but only on the entire set.

Kremlin spokesman Dmitry Peskov said the results were "a triumphant referendum on trust in President Putin."

But Putin's critics argued that the results were rigged and didn't reflect decreasing enthusiasm for the once-popular president.

Putin's approval rating was at 59% in May, according to the Levada Center, Russia's top independent pollster. The lowest in two decades, the numbers have been steadily going down in the past five years amid growing frustration over declining living standards.

Critics pointed to a number of irregularities, as well as a lack of transparency and independent monitoring of voting that they said undermined the validity of the results.

For the first time in Russia, polls were kept open for an entire week, with ballot boxes unattended at night. Voting also took place outside polling stations — in some instances on street benches, tree stumps and in the trunks of cars — as well as online in some places, including Moscow.

Golos, Russia's top independent election monitoring group, called the results "falsified."

Dmitry Gudkov, a former lawmaker and now an opposition leader, pointed to independent exit polls that reported over 54% of more than 5,000 respondents in Moscow, and 63% of nearly 3,000 respondents in St. Petersburg, voted against the amendments.

A nationwide poll by Levada showed that 68% of those who had cast their ballot by June 27 voted "yes," and 54% of those who hadn't would approve the amendments.

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