Títulos en Ciencia y tecnología

For decades, the blasts and howls of the electric guitar have been some of the defining sounds of popular music. But more than a century of effort and innovation had to happen before this instrument went electric. Learn about the master craftspeople who created the guitar as we know it, the inventors who figured out how to send guitar notes through amplifiers and give the guitar a bigger sound, and the musicians whose legendary playing put it at the center of rock 'n' roll.

Earth is home to trillions of germs. But for most of human history, people didn't know germs existed! Healers of the past had different ideas about illnesses and their cures. They blamed illnesses on other causes and sometimes tried dangerous treatments. The invention of tools such as the microscope changed everything, allowing doctors and scientists to see germs and study their effects. This vivid history profiles the people who helped discover germs. Discover the ongoing breakthroughs in research—and germs' surprising benefits for safety and sustainable energy.

Lena Blackburne loved baseball. He watched it, he played it, he coached it. But he didn't love the ways players broke in new baseballs. Tired of soggy, blackened, stinky baseballs, he found a better way. Thanks to a well-timed fishing trip and a top-secret mud recipe, Lena Blackburne Baseball Rubbing Mud was born. For seventy-five years, baseball teams have used Lena's magic mud to prepare baseballs before every game. Listen to the story of how Lena's mud went from a riverbank to the major leagues and all the way to the Hall of Fame.

For centuries, people misunderstood how the heart works. As our knowledge grew, heart surgery remained a dangerous medical procedure. Even after organ transplants become common, surgeons struggled to transplant hearts and keep patients alive. But small groups of pioneering doctors attempted this difficult surgery, changing the lives of patients. This history traces their leap forward and the medical world's newest advancements in heart health technology. Learn about innovations such as artificial hearts and 3D-printed living tissue.

Sneakers grew out of efforts to make more durable, more comfortable shoes—and became a major link between sports and fashion. Their sales rose with the popularity of tennis and exploded along with basketball, leading to celebrity endorsements, big-name brands, and continued technological breakthroughs. In the twenty-first century, sneakers are still evolving, along with "sneaker influencer" social media, smart tech, and other hot new trends.

Vaccines have been used to safely introduce people's bodies to diseases for centuries, and they save millions of lives each year. By giving people a weakened or dead version of a disease, a vaccine allows the body to develop antibodies which recognize and fight the disease later on. Early vaccinations used dry scabs from smallpox to promote smallpox immunity. Doctors and scientists across nations took and improved the method, developing vaccines for health crises from whooping cough to polio to COVID-19. This history features famous cases and current challenges.

Discover a jungle of repulsive plants in this gross guide! Learn about a flower that smells like rotting meat, a plant that swallows bugs, leaves that make you itch, and more.

These gross animals are fleshy, slimy, and deadly! Learn about blood-sucking fish, stinky skunks, scary goblin sharks and more. Discover how disgusting traits help these animals survive.

These creepy creatures will make your skin crawl! Learn about blood-sucking leeches, smelly stinkbugs, giant centipedes, and more. See how their disgusting behaviors keep these animals alive.

All his life, William Stanley searched for a wild place of his own. Growing up in the straightened-out city blocks of his childhood and finding some respite in summer trips to a cabin in the woods, he yearned for space, fragrant soil, tall trees, and the silence that surrounds them. In Hawaii, he learned of acres of land depleted from toxic agricultural practices, and he became determined to restore that land and create one of the most comprehensive palm gardens in the world.

A tiny honeybee emerges through the wax cap of her cell. Driven to protect and take care of her hive, she cleans the nursery and feeds the larvae and the queen. But is she strong enough to fly? Not yet! Apis builds wax comb to store honey and transfers pollen from other bees into the storage. She defends the hive from invaders. And finally, she begins her new life as an adventurer. The confining walls of the hive fall away as Apis takes to the air, finally free, into a clear blue sky full of promise.

Plasticus Maritimus is a valuable, middle-grade resource to help kids learn about the effects of waterborne plastics and how they are affecting our world’s oceans and the planet itself. Ana Pêgo’s approach is positive and practical, inspiring listeners to not only learn about the problem, but to also become part of the solution. A fun “field guide” shares how to identify plastics as an invasive species: how to categorize it, collect it, and safely move it elsewhere.

A chi appartengono le risorse della Terra? Gli interessi, il denaro e il potere si scontrano con l'amore per gli uomini e per la natura. Amore contro pallottole. Ragazzini contro il bracconiere più spietato del mondo. Due ragazzi, un cane, una biologa e un vecchio monaco buddista combattono senza armi una guerra per salvare dal saccheggio una smisurata ricchezza e proteggere un misterioso popolo di ombre.

Pea pods, cucumbers, and strawberries provide plenty of opportunities for counting in the garden! Follow Dad, Grandma, and other family members as they pick and count.

How do animals survive in planet Earth's most extreme regions? Snow, ice, and subzero temps make the North and South Poles nearly impossible places to live. But several animals from musk oxen to penguins call these regions home. Find out how their amazing behaviors and body parts have adapted to these harsh conditions.

Learn how fossils teach us about dinosaurs.

Find out how animals survive Earth's most extreme regions! From the rain-drenched treetops to the sun-starved forest floor, the rain forest is a tough place to live. But many animals from geckos to jaguars thrive in this environment. Discover the amazing body parts and behaviors that make living there possible.

Skateboards, roller coasters, and playground slides, all of these are ramps. From award-winning author Michael Dahl, this book provides an introduction to one of the most important machines humans rely on. With fun facts, find out how people use ramps every day.

Discover the amazing ways animals adapt to the most extreme regions on Earth. Fiery temps and little rain make the desert a difficult place to survive. But several animals from fennec foxes to kangaroo rats have adapted to these harsh conditions. Find out how their unique behaviors and body parts allow them to call this biome home.

The weather is windy today. Do you know what to do? Come explore the weather today and learn what to do on a windy day.