Resultados para "A" en Ciencia y tecnología

A boy rides a bicycle down a dusty road. But in his mind, he envisions himself traveling at a speed beyond imagining, on a beam of light. This brilliant mind will one day offer up some of the most revolutionary ideas ever conceived. From a boy endlessly fascinated by the wonders around him, Albert Einstein ultimately grows into a man of genius recognized the world over for profoundly illuminating our understanding of the universe. Jennifer Berne and Vladimir Radunsky invite the reader to travel along with Einstein on a journey full of curiosity, laughter, and scientific discovery. Parents and children alike will appreciate this moving story of the powerful difference imagination can make in any life.

Wasser ist überlebenswichtig: Wir brauchen es zum Trinken, zum Waschen, aber auch zur Herstellung von unserem Essen und Alltagsgegenständen oder zum Erzeugen von Strom. Wo gibt es überall Wasser auf der Erde? Wie entstehen Regen und Schnee? Das Hörspiel erklärt, was an Flüssen geschieht und warum wir die Meere brauchen. Kinder erfahren zudem, warum es zu Überschwemmungen, aber auch zu Wassermangel kommt.

¿Cómo se siente frío? ¿Por qué nos enfermamos más en invierno? ¿Cómo se forma la nieve? ¿Cómo sobreviven los animales? Las respuestas a muchas de las preguntas que trae la estación más fría del año, narradas con simplicidad y mucho ritmo. Premios: "The White Ravens", Internationale...

Learn about rain and its role in the water cycle.

Poznaj Mię i Niko–dwójkę przyjaciół, którzy dzięki ciekawości i rozmowom odkrywają tajemnice wszechświata. Dziecko słuchając historii naturalnie poznaje podstawy działania kosmosu, rozwija wyobraźnię i uczy się zadawać pytania.

Alien abductions? Mysterious lights in the sky? Could these events actually be the work of extra terrestrials? Get the facts about the top ten UFO and alien mysteries of all time.

Meet a man who was a medical doctor, a geologist, and a surveyor who also knew botany, zoology, and chemistry. Douglass Houghton was all of these, even though he stood barely five feet, four inches tall. Follow his trail as Michigan's first state geologist, as he explores the unknown wilderness of both peninsulas, in the 1830s and 1840s to discover the potential resources of a brand-new state.

Bacterial infections are a constant threat to human health. Antibiotics stop a bacterial infection from multiplying. They help treat pneumonia, strep throat, and many other infections. But before antibiotics, treatments for these diseases were limited or misguided. In 1929, the accidental discovery of the first antibiotic, a bacteria-killing liquid called penicillin, kicked off a medical revolution. The use of this new treatment has saved countless lives, from World War II soldiers to modern hospital patients. Explore current issues in antibiotics and the best ways to fight bacteria.

Nata in Via delle Cento Stelle a Firenze il 12 giugno 1922, Margherita hack non poteva che diventare un'astrofisica di fama mondiale. Eppure lei non ha mai creduto al destino: credeva invece nel merito, nella possibilità di realizzare i propri sogni. Lei che di sogni ne aveva tantissimi: dall'atletica, in cui sperava di conquistare una medaglia alle Olimpiadi, alla bici, con la quale fu amore a prima vista, fino alle stelle, scoperte a scuola un po' per caso e che le hanno illuminato il cammino fino ad arrivare alla guida dell'osservatorio astronomico di Trieste.

La scienza prenderà sempre delle cantonate. Potranno volerci anni, addirittura secoli o millenni, ma alla fine gli errori verranno trovati. E in fondo, quando ci prendono per le orecchie perché abbiamo sbagliato, miglioriamo tutti. Scoprendo sempre più l'universo che ci circonda. La scienza può sbagliare? La risposta è sì. E non solo può, ma deve. Se sogni di diventare uno scienziato o una scienziata, preparati a farne di tutti i colori (e avvisa i tuoi genitori, così cominciano a mettersi il cuore in pace): il segreto infatti non è essere infallibili, bensì non arrendersi mai.

Plastic bags are cheap and easy to use. But what happens when a bag breaks or is no longer needed? In Njau, Gambia, people simply dropped the bags and went on their way. One plastic bag became two. Then 10. Then a hundred. The bags accumulated in ugly heaps alongside roads. Water pooled in them, bringing mosquitoes and disease. Some bags were burned, leaving behind a terrible smell. Some were buried, but they strangled gardens. They killed livestock that tried to eat them. Something had to change.

Taking care of your eyes is important whether you wear glasses or not. If you take good care of your eyes, they will help you enjoy the world around you and be safe.

You know Brachiosaurus. Now meet Mbiresaurus raathi! This long-necked dino lived more than 230 million years ago in present-day Zimbabwe. It walked on two legs and ate both plants and animals. Its mouth was filled with sharp, sawlike teeth. Take a closer look . . . if you dare.

You know Triceratops. Now meet Bisticeratops froeseorum! This horned dino lived more than seventy million years ago and was discovered in the deserts of Arizona. Its neck was protected by a large, colorful frill. Two long horns and rough, bumpy skin kept it safe from predators. Take a closer look . . . if you dare.

Who rules the mangrove forest, Bengal tigers or chital deer? In the Sundarbans Forest Reserve in South Asia, Bengal tigers are fierce hunters with strong muscles and sharp teeth. But chital deer can run fast, and they live in groups to protect one another. Discover both animals’ unique traits to find out if the predator or the prey would win in a fight.

People imagined artificial intelligence as far back as the early 1900s. In the 1940s, the first programmed computers were created. Over time, scientists created better computers modeled after the human brain. These days computers can create art or help students with their homework. What will they do in the coming years? Dive in to learn about the past, present, and future of AI.

Engineers and scientists have been developing AI since the 1950s, and it has come a long way since then! AI can now assist in everyday life, from self-driving cars to diagnosing illnesses and suggesting treatments. But how does it work? Explore the inner workings of AI, from machine learning and deep learning to artificial neural networks modeled after the human brain.

In the past, people could only imagine how artificial intelligence might impact humanity. These days we’re seeing AI in action. AI can be used in many forms of art, from music to poetry. AI’s creative potential can be exciting, but some also have ethical concerns. Check out how AI is changing the art world, sparking both new artistic possibilities and complex ethical questions.

Green anacondas and capybaras go head-to-head in South American swamps, marshes, and streams. Green anacondas, one of the world's largest snakes, sneak up on prey and then strike! But capybaras, which are the world's biggest rodents, are strong and skilled swimmers. Discover which animal comes out on top in this battle between predator and prey.

Explora el rol crucial de los árboles marchitos o en proceso de secado, conocidos como troncones, en los ecosistemas forestales. A través de una narrativa atractiva y fotografías vívidas, este libro explica como los troncones proporcionan hábitats para una variedad de animales, incluyendo aves, mamíferos, reptiles e insectos. Detalla las diferentes formas en las que los animales usan troncones para anidar, refugiarse, alimentarse y encaramarse.