--- title: CAKE Kalk AP: The 100 Best Inventions of 2021 description: Find out why CAKE Kalk AP is one of the best inventions of 2021 canonical: https://time.com/collections/best-inventions-2021/6113114/kalk-ap/ article:content_tier: free article:published_time: 2021-11-10T11:13:39.000Z article:modified_time: 2026-03-02T23:56:05.237Z og:title: CAKE Kalk AP: The 100 Best Inventions of 2021 og:description: Find out why CAKE Kalk AP made this year's list og:url: https://time.com/collections/best-inventions-2021/6113114/kalk-ap/ og:site_name: TIME og:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt275561fc91a897a0/698a1e88db29871de12670d9/best-inventions-2021-Kalk-AP-02.jpg?branch=production&width=3840&quality=75&auto=webp&crop=16:9 og:image:width: 1200 og:image:height: 675 og:image:alt: CAKE Kalk AP: The 100 Best Inventions of 2021 og:type: article twitter:card: summary_large_image twitter:title: CAKE Kalk AP: The 100 Best Inventions of 2021 twitter:description: Find out why CAKE Kalk AP made this year's list twitter:image: https://static.time.com/v3/assets/bltea6093859af6183b/blt275561fc91a897a0/698a1e88db29871de12670d9/best-inventions-2021-Kalk-AP-02.jpg?branch=production&width=3840&quality=75&auto=webp&crop=16:9 --- Nov 10, 2021 # Revving Up Conservation CAKE Kalk AP by [TIME Staff](https://time.com/author/time-staff/) ## TIME Staff  Justin Sullivan Rangers across Africa’s national parks and wildlife reserves are in a constant battle to protect endangered species from poachers. But those rangers are at a disadvantage: their loud gasoline-powered motorbikes alert poachers to their presence. Swedish electric-bike company [CAKE](https://ridecake.com/en/electric-bush-bikes/#/) worked with the Southern African Wildlife College to adapt their Kalk bike, giving it a super-quiet electric motor and a portable solar-panel charger. For $25,000, consumers can buy their own solar-powered bike—which will also pay for another to be sent to the anti-poaching fight. _—Ciara Nugent_ ```json [{"@context":"https://schema.org","@type":"Article","@id":"https://time.com/collections/best-inventions-2021/6113114/kalk-ap/","mainEntityOfPage":{"@type":"WebPage","@id":"https://time.com/collections/best-inventions-2021/6113114/kalk-ap/"},"headline":"Revving Up Conservation","datePublished":"2021-11-10T11:13:39.000Z","dateModified":"2026-03-02T23:56:05.237Z","description":"","url":"https://time.com/collections/best-inventions-2021/6113114/kalk-ap/","keywords":["list","franchise","best inventions","Best Inventions 2021"],"thumbnailUrl":"https://static.time.com/v3/assets/bltea6093859af6183b/blt275561fc91a897a0/698a1e88db29871de12670d9/best-inventions-2021-Kalk-AP-02.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","author":[{"@type":"Person","name":"TIME Staff","jobTitle":null,"url":"https://time.com/author/time-staff/"}],"creator":"TIME Staff","articleSection":"","image":[{"@type":"ImageObject","url":"https://static.time.com/v3/assets/bltea6093859af6183b/blt275561fc91a897a0/698a1e88db29871de12670d9/best-inventions-2021-Kalk-AP-02.jpg?branch=production&width=1200&quality=75&auto=webp&crop=1200:675&height=675","width":1200,"height":675}],"publisher":{"@type":"Organization","name":"Time","url":"https://time.com/","logo":{"@type":"ImageObject","url":"https://time.com/images/logo.png","width":528,"height":156},"foundingDate":"March 3, 1923","sameAs":["https://www.facebook.com/time","https://www.instagram.com/time/?hl=en","https://twitter.com/time","https://www.pinterest.com/timemagazine"]}},{"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"item":{"@id":"https://time.com/collections/best-inventions-2021/6113114/kalk-ap/","name":"Revving Up Conservation"}}]}] ```