Books published by publisher Twenty-First Century

Scientists are on the verge of a revolution in biomedical engineering that will forever change the way we think about medicine, even life itself. Cutting-edge researchers are working to build body organs and tissue in the lab. They are developing ways to encourage the body to regenerate damaged or diseased bone and muscle tissue. Scientists are striving to re-route visual stimuli to the brain to help blind people see. They may soon discover methods to enlist the trillions of microbes living in our bodies to help us fight disease. Learn about four strands of bioengineering—tissue engineering and regenerative medicine, neuroengineering, microbial science, and genetic engineering and synthetic biology—and meet scientists working in these fields.

What do giant squids, mantis shrimp, and fireflies have in common? These animals, along with a wide range of creatures, are able to give off light; this is called bioluminescence. Different species use different chemistries to bioluminesce, and they produce their light for a variety of reasons, including communication, hunting, and self-defense. Bioluminescence is a unique and fascinating adaptation found in the animal kingdom. Surprisingly, about half of all known phyla (a classification for animals that share the same body type) contain some bioluminescent species. Scientists don't yet understand all facets of bioluminescence, but they have managed to harness the glow and use it in a myriad of ways. One of the most important applications involves using bioluminescence as a microscope in medical studies. For example, laboratory scientists can create fluorescent malaria parasites to track the path by which the disease is spread from a mosquito to the animal it bites. Bioluminescent proteins are also helping researchers learn more about cancer, HIV and other viruses, and complex neurological processes. In fact, bioluminescent proteins are so useful to twenty-first-century medicine that two groups of scientists, one in 2008 and the other in 2014, were awarded the Nobel Prize in Chemistry for their work with these proteins and related technologies. Even artists and fashion designers use bioluminescence in their work to create glowing, light-sensitive paintings and clothing lines. Author Marc Zimmer, a world-renowned specialist in fluorescent proteins, takes readers on a glowing journey into the frontiers of bioluminescence.

Scientists have identified at least 100 million pieces of space debris―from paint chips to nonoperational zombie satellites―floating in Earth's orbit. And over 100 tons of those pieces enter Earth's atmosphere each year! Journey into outer space and learn about the dangers of space junk collisions, how scientists track them, and how space agencies are working to develop new technologies to clean up the space junk. Along the way, you'll hear from the scientists who are working to ensure that outer space remains a safe place to travel and explore. If we don't tackle the space junk problem, it might be impossible to travel into space; it could even trap us on Earth.

For thousands of years, philosophers and scientists have searched for the keys to human personality. Today, personality testing is a multibillion-dollar business. Many people take personality tests online just for fun. Whether silly or serious, personality testing can be an eye-opening way to better understand yourself, your family, and your friends. Just My Type introduces readers to the history of personality profiling, ranging from ancient Chinese astrology, to Freud and Jung, to the modern-day Myers-Briggs and the Minnesota Multiphasic Personality Inventory (MMPI) assessments. Examine the world of online personality assessments through mini self-administered quizzes. Learn how to distinguish useful applications from biased typecasting.

Teen sex. STIs. Sexting. Rape. Sexual harassment. #MeToo and #YesAllWomen. Today's teens launch into their sexual lives facing challenging issues but with little if any formalized learning about sex and human reproduction. Many of them get their sex ed from online porn. Through this authoritative, inclusive, and teen-friendly overview, readers learn the basics about sex, sexuality, human reproduction and development, birth control, gender identity, healthy communication, dating, relationships and break ups, the importance of consent, safety, body positivity and healthy lifestyles, media myths, and more. Advice-column-style Q&As and real-life stories add human drama and authenticity.

Without any human influence, nature has created extraordinary wonders - from majestic mountains and bubbling volcanoes to amazing plants and animals. These wonders are found across all the continents and oceans of this planet. In a tour of the seven greatest wonders of Asia and the Middle East, one of the first wonders we'll see is Mount Everest, between Nepal and Tibet. It's the tallest mountain on Earth. We'll also visit the Chocolate Hills in the Philippines. In the dry season, these hills look like afield of chocolate kisses. The salty Dead Sea sits between Israel and Jordan. If you were to swim in this sea, you wouldn't even sink.

Prom is about more than corsages and boutonnieres, promposals and after-parties. It's an event that teens are claiming as a way not only to have fun with friends but to also express their creativity and their identities.Learn about the first gay and lesbian teen couples to insist on the legal right to bring their dates to prom. Discover how modern prom fashions are pushing the boundaries of what guys and girls can wear to the big night out. You'll also get tips from high school graduates about dealing with prom pressures—and how to protect your physical and emotional health while you celebrate.