By Michelle Nichols UNITED NATIONS More than 75 countries will "commit to take action to end the use

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A 3-D-printed toilet has been invented and the surface is so slippery that nothing can leave a mark on it. Cleaning the toilet has to be one of the grimmest household chores, but thanks to new material, you may never have to scrub a loo again. The toilet is the invention of Yike Li at Huazhong University of Science and Technology in Wuhan, China, who, alongside colleagues, invented a toilet whose surface is so slippery that nothing stains it and uses less water for each flush. The team created a prototype of the toilet around 10 times smaller than a real one. It was made using 3D printing technology, where particles of plastic and hydrophobic sand grains were fused together with lasers. The surface of the toilet was lubricated with a type of silicon oil that also penetrated the surface due to the complex structure of the material. The team tested the toilet with a variety of substances, including honey, yoghurt, muddy water as well as synthetic faeces. They found that none of the substances stuck to the toilet bowl. Amazingly, the toilet was just as slippery after having been rubbed with sandpaper over 1,000 times, which Li believes is due to the oil being able to penetrate the material of the toilet. Li believes the technology would be suited for settings in which a toilet gets a lot of use, such as on modes of transport and in public toilets. He explained: “The reduced flushing volume would result in less wasted water during transportation to the processing facilities, thereby saving transportation costs.” But, before that can happen, Li says the technology needs to be adapted for use on a full-sized toilet and also needs to be cheaper to make. You can see the toilet in action below courtesy of New Scientist. Nothing can stick to this 3D-printed slippery toilet youtu.be Sign up to our free Indy100 weekly newsletter Have your say in our news democracy. Click the upvote icon at the top of the page to help raise this article through the indy100 rankings.

Several Jeopardy! champions have announced they will refuse to appear on the game show during

This content originally appeared on Mashable for a US audience and has been adapted for

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Kaia Gerber has issued some guidance for her elder brother Presley Gerber about taking care of his skin in the sun. Presley, 24, and Kaia, 21, are the children of model Cindy Crawford and Rande Gerber, a businessman. Both siblings followed in their mother’s footsteps and have successful modelling careers, often sharing their work and off-duty looks on social media. On Saturday (19 August), Presley shared photos of himself on a sandy beach while topless. The images show him with a bandana draped around his shoulders. In the caption to the Instagram post, Presley wrote: “Sunscreen’s a myth”. In fact, sun protection provides an essential barrier to harmful UVA and UVB rays. According to the American Cancer Society, UVB rays are responsible for the majority of cases of skin cancer. In disagreement with her brother’s statement, Kaia left a public comment on the post to give him some alternative guidance. “Hi Presley! It’s me, your sister!” she began her message. “Remember me from childhood? We share the same parents [wacky face emoji] I actually wanted to share with you that sunscreen is not a myth!! It is real!! I actually use it myself!!” Fans and followers have jumped in on their exchange, with many leaving laughing emojis at the humorous tone of Kaia’s message. “Absolutely! Sharing is caring @presleygerber!” one fan remarked. “Sis has got your back! You've raised them well @cindycrawford!” Another simply wrote: “Love your brain Kaia!!” Earlier this year, Kaia shared her thoughts on the “nepo baby” debate, which highlights the privilege enjoyed by those in the entertainment and creative industries who have famous parents. Speaking to Elle in January, the model and actor acknowledged the ways that nepotism had helped her career. “I won’t deny the privilege that I have,” she said. “Even if it’s just the fact that I have a really great source of information and someone to give me great advice, that alone I feel very fortunate for.” She also shared a comment that Crawford made about her daughter’s busy modelling career. “My mom always joked, ‘If I could call and book a Chanel campaign, it would be for me and not you,’” Gerber added. “But I also have met amazing people through my mom whom I now get to work with.” Read More Stylist comes to bride-to-be’s rescue after hair is ‘destroyed’ just before wedding Geri Halliwell says she was ‘quite grumpy’ to Christian Horner in their early relationship Prince William criticised for including Charlotte in apology for missing Lionesses final James Blunt claims he changed his age on his Wikipedia page Shirlie Kemp says male doctor told her to ‘get over’ endometriosis Chrissy Teigen posts topless photo to remind fans to get mammograms

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