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Riddles for adults and children

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Riddles for adults and children

A large selection of riddles on various topics for adults and children. More than 5000 interesting riddles with answers.

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Thematic riddles in Russian and Ukrainian with answers



Latest news of science and technology, new electronics:

The speech of sperm whales is similar to that of humans 18.05.2024

In the world of the ocean, where the mysterious and unknown coexists with the studied, sperm whales, with their huge brains, are of particular interest to science. Researchers, working with a huge array of audio recordings collected during the Dominica Sperm Whale Project (DSWP) - more than 8000 recordings, seek to unravel the secrets of their communication and understand the structure and complexity of the language of these mysterious creatures. By studying in detail the recordings of 60 sperm whales in the eastern Caribbean, scientists have revealed surprising features of their communication, revealing the complexity of their language. "Our observations indicate that these whales have a highly developed combinatorial communication system, including rubato and ornaments, which indicates their ability to quickly adapt and vary during communication. Despite significant differences in evolution, sperm whales have elements in their communication that are characteristic of human communication," says Shane Gero, a biologist at Carleton University and director of the CETI project. Issl ... >>

Electron spin for quantum information transfer 18.05.2024

The transfer of quantum information remains one of the key tasks of modern science. Recent advances in the use of electron spin to expand the capabilities of information transfer in quantum systems have become very important. Researchers at Lawrence Berkeley National Laboratory are pushing the frontiers of quantum information science by experimenting with the possibilities of electron spin. Electron spin, a natural quantum bit, is a potentially powerful means for storing and transmitting information in quantum systems. Magnon wave packets, collective excitations of electron spin, have revealed their potential to transmit quantum information over significant distances. The work of Berkeley Lab researchers has revolutionized the way such excitations propagate in antiferromagnets, opening up new prospects for quantum technologies. Using pairs of laser pulses, scientists disrupted antiferromagnetic order in one place and simultaneously studied it in another, creating ... >>

Sound-absorbing silk 17.05.2024

In a world where noise is becoming increasingly intrusive, the emergence of innovative materials that can reduce its impact is of great interest. MIT researchers have unveiled a new sound-absorbing silk fabric that promises to revolutionize quiet spaces. The Massachusetts Institute of Technology (MIT) has made significant breakthroughs in the field of sound absorption. Researchers have developed a special silk fabric that can effectively absorb sound and create cozy, quiet environments. The fabric, thinner than a human hair, contains a unique vibrating fiber that is activated when voltage is applied to it. This feature allows the fabric to be used to suppress sound waves in two different ways. The first method uses fabric vibrations to generate sound waves that cover and cancel out unwanted noise, similar to noise-canceling headphones. This p ... >>

Random news from the Archive

Tablet Toshiba Thrive 25.07.2011

The Toshiba Thrive tablet introduced by the company is based on the NVIDIA Tegra 2 processor, runs Android 3.1, has a 10,1-inch screen with a resolution of 1280x800 and will be available in three memory variants: 8,16 and 32 GB.

The cost of devices will be $429, $479 and $579 respectively. The weight of the novelty is 750 g, and the battery lasts for 7 hours of HD video playback.

Other interesting news:

▪ Voice preferences of women and men

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▪ Amoeba on a rubber track

▪ Smartphones outsell conventional cell phones

▪ Water freezing point record broken

News feed of science and technology, new electronics


Interesting materials of the Free Technical Library:

▪ site section Electrical work. Article selection

▪ article Kunkator. Popular expression

▪ article Why did the city of Cherkessk change three names in five years? Detailed answer

▪ article Carpenter. Standard instruction on labor protection

▪ article Musical garlands. Encyclopedia of radio electronics and electrical engineering

▪ article Double Wall Paper Bag - Disappearance. Focus Secret

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