Books published by publisher Twenty-First Century

In the sixth century B.C.E., the Greek philosopher Anaximander theorized that Earth was at the center of the cosmos. That idea became ingrained in scientific thinking and Christian religious beliefs for more than one thousand years. Defiance of church doctrine could mean death, so no one dared dispute this long-accepted idea. No one except a handful of courageous scientists. In the 1500s and 1600s, men like Nicolaus Copernicus, Johanned Kepler, Galileo Galilei, and Isaac Newton began to ask questions. What if Earth actually orbited the sun, instead of the other way around? What if the universe was much bigger than anyone imagined? These scientists risked their reputations―even their lives―to challenge the very heart of Catholic dogma and scientific tradition. Yet, in less than 200 years, their radical thinking overturned theories that had lasted more than a millennium. Join these bold thinkers on the journey of discovery that forever changed our understanding of the cosmos.

On a global scale, humans create around 2.6 trillion pounds of waste every year. None of this trash is harmless―landfills and dumps leak toxic chemicals into soil and groundwater, while incinerators release toxic gases and particles into the air. What can we do to keep garbage from swallowing up Earth? Reducing, reusing, recycling, and upcycling are some of the answers. Learn more about the work of the US Environmental Protection Agency, the Ocean Cleanup Array, the zero waste movement, and the many other government, business, research, and youth efforts working to solve our planet's garbage crisis.

In December 2015, the Pentagon changed a rule to allow American women to serve for the first time ever in front-line ground combat troops. Women have fulfilled many military roles throughout history, including nursing; driving ambulances; handling administrative duties; working as mechanics; and serving in the WASPs, WACs, WAVES, and SPARS. More recently women are flying jets, conducting surveillance, commanding naval ships, and now fighting on the front lines. Yet no matter their official title, they have faced devastating discrimination―from lack of advancement, economic inequity, and inadequate veteran support, to sexual harassment and rape. Meet the women who have served their country courageously and who are standing up for fairness in the US military.

Huge, towering clouds build up in the sky―it's a super cell. The Doppler radar indicates that the system is rotating. But is there a funnel? Is it touching the ground? Only a storm chaser can confirm when a tornado is present―and help meteorologists warn nearby towns. Whenever severe weather threatens, storm chasers hit the road to hunt for tornadoes, hurricanes, or violent storms. Some drive thousands of miles in just a few days as they follow a storm system from Iowa to Texas. Others serve their cities and towns by taking photos from their backyards and phoning in storm details to local weather stations. Specially trained Hurricane Hunters hop into aircraft packed with scientific instruments to fly deep into powerful hurricanes, hoping to reach the eye of the storm. Are storm chasers a bunch of foolish daredevils? Not at all. Many are scientists while others are professional photographers and videographers. Storm chasers arm themselves with training about severe weather, use sophisticated instruments, and follow safety guidelines. In Chasing the Storm, you'll meet real storm chasers and meteorologists, hear their stories, and discover how they do their work. You'll learn tornado basics, get a great window into the science of meteorology, and learn how to pursue a career in the field. You might even decide to become a storm chaser yourself!

In 2011 a computer named Watson outscored two human competitors on the TV quiz show Jeopardy! and snagged the million-dollar prize. Watson isn't the only machine keeping up with humans. The field of artificial intelligence (AI) is booming, with drones, robots, and computers handling tasks that once only humans could perform. Such advances raise challenging questions. Do Watson and other computers really think? Can machines acquire self-awareness? Is AI a promising or a dangerous technology? No machine, not even Watson, yet comes close to matching human intelligence, but many scientists believe it is only a matter of time before we reach this milestone. What will such a future look like?

"Houston, we've had a problem."On April 13, 1970, the three astronauts aboard the Apollo 13 spacecraft were headed to the moon when a sudden explosion rocked the ship. Oxygen levels began depleting rapidly. Electrical power began to fail. Astronauts James Lovell, Jack Swigert, and Fred Haise were about to be stranded in the inky void of outer space.The mission to the moon was scrapped. Now, Apollo 13's only goal was to bring the crew home. With the damaged spacecraft hurtling towards the moon at roughly six thousand miles per hour, there was little hope of success. But the astronauts and mission control were fully prepared to do whatever it took to return the crew to Earth.This space disaster occurred at the peak of the United States' Space Race against the Soviet Union. But for four days in 1970, the two nations put aside their differences, and the entire world watched the skies, hoping and praying the astronauts would return safely. As missions to Mars and commercial space flight become a reality, the time is now to be reminded of our common humanity, of how rivals can work together and support each other towards a shared goal. Because no matter what happens or where we travel, we all call Earth home.

As USA TODAY, the Nation's No. 1 Newspaper, puts it, "[Tupac] Shakur saw himself as both artist and urban soldier, battling the media, the law, the courts and rival rappers." Tupac overcame poverty to become one of hip-hop's biggest stars. His life, death, and music were all surrounded by controversy. Raised by a single mother and ex-Black Panther in Harlem, Tupac grew up aware of the problems in society around him. His social conscience and creative talents made him a unique voice in rap music. He starred in several Hollywood films about the challenges of urban life. But Tupac also struggled with drug abuse, served time in prison, and faced extreme violence―including a shooting that took his life. Throughout Tupac Shakur's career, he outraged some and inspired many. He continues to be known as one of the greatest rappers in the history of hip-hop.

As USA TODAY, The Nation's No. 1 Newspaper, puts it, Stephenie Meyer is "one of those rare success stories that inspire unpublished writers." In 2003, Meyer was a 29-year-old mother of three in suburban Phoenix, Arizona. She had no thought of writing a book. Then one night she had a vivid dream of a teenage couple with one unusual problem―the young man was a vampire. Meyer decided to write down her dream. Within six months, she had turned her notes into anovel, Twilight, and secured a $750,000 deal with a publisher. Published in 2005, Twilight soon landed on a New York Times best seller list. Three sequels―New Moon, Eclipse, and Breaking Dawn―thrilled teen and adult fans alike. Movie deals, merchandise, a clothing line, and Twilight-themed tourism followed. With more than 85 million copies sold worldwide, the Twilight books launched Meyer to fame and fortune. But she remains committed to family and to writing―as fans wait to see what Stephenie Meyer dreams up next.

Until the mid-1990s, scientists only guessed that the universe held exoplanets, or planets beyond our solar system. But using advanced physics and powerful telescopes, scientists have since identified more than three thousand exoplanets. This work has revealed fascinating worlds, including a planet that oozes lavalike fluids and a planet that glows bright pink.Even more fascinating, scientists think that some exoplanets might contain life. Many orbit in the Goldilocks zone, the region around a star that's not too hot or too cold for liquid water, a key ingredient for life. This book examines exoplanets, the possibilities for life beyond Earth, and the cutting-edge technologies scientists use to learn about distant worlds.

"Takes readers through the life cycle of bees, their important role in pollination, and presents reasons for their decline... An important resource for all libraries." --Booklist, starred reviewApples, blueberries, peppers, cucumbers, coffee, and vanilla. Do you like to eat and drink? Then you might want to thank a bee.Bees pollinate 75 percent of the fruits, vegetables, and nuts grown in the United States. Around the world, bees pollinate $24 billion worth of crops each year. Without bees, humans would face a drastically reduced diet. We need bees to grow the foods that keep us healthy.But numbers of bees are falling, and that has scientists alarmed. What's causing the decline? Diseases, pesticides, climate change, and loss of habitat are all threatening bee populations. Some bee species are teetering on the brink of extinction."Accessible and concise" (Kirkus), this book will teach you about the many bee species on Earth -- their nests, their colonies, their life cycles, and their vital connection to flowering plants. Most importantly, you'll discover what you can do to help."If we had to try and do what bees do on a daily basis, if we had to come out here and hand pollinate all of our native plants and our agricultural plants, there is physically no way we could do it. . . . Our best bet is to conserve our native bees." --ecologist Rebecca Irwin, North Carolina State University