検索キーワード： 動物

The sun sinks over the Rio Grande, the mountains around it glow orange, and the world slows down. The Mexican free-tailed bats inside the Jornada Cave are just starting to stretch and murmur. In this episode, we visit the nursery where all the baby bats stay together, and we accompany a new mother as she journeys into the sky with the rest of her crew for a night of hunting bugs via echolocation.

Sixty-six million years ago the dinosaurs were wiped from the face of the earth. Today a new generation of dinosaur hunters, armed with cutting-edge technology, is piecing together the complete story of how the dinosaurs created a hugely successful empire that lasted for around 150 million years.

For as long as humans have existed, insects have been our constant companions. Yet we hardly know them, not even the ones we’re closest to: those that eat our food, share our beds, and live in our homes. Organizing his book alphabetically, Hugh Raffles weaves together brief vignettes, meditations, and extended essays, taking the listener on a mesmerizing exploration of history and science, anthropology and travel, economics, philosophy, and popular culture.

As people come to understand more about animals' inner lives, we feel a growing compassion, a desire to better their lives. But how do we translate this compassion into helping other creatures, both those that are and are not our pets? Bringing together the latest science with heartfelt storytelling, Animals' Best Friends reveals the opportunities we have in everyday life to help animals in our homes, in the wild, in zoos, and in science labs, as well as those considered to be food.

What is animal welfare? This concise and accessible guide is for anyone who is interested in animals and who has wondered how we can assess their welfare scientifically. It defines animal welfare as "health and animals having what they want", a definition that can be easily understood by scientists and non-scientists alike, expresses in simple words what underlies many existing definitions, and shows what evidence we need to collect to improve animal welfare in practice. Above all, it puts the animal's own point of view at the heart of an assessment of its welfare.

Scientists have long counseled against interpreting animal behavior in terms of human emotions, warning that such anthropomorphizing limits our ability to understand animals as they really are. Yet what are we to make of a female gorilla in a German zoo who spent days mourning the death of her baby? Or a wild female elephant who cared for a younger one after she was injured by a rambunctious teenage male?

In Eager, environmental journalist Ben Goldfarb reveals that our modern idea of what a healthy landscape looks like and how it functions is wrong, distorted by the fur trade that once trapped out millions of beavers from North America's lakes and rivers. The consequences of losing beavers were profound: streams eroded, wetlands dried up, and species from salmon to swans lost vital habitat. Today, a growing coalition of "Beaver Believers" recognizes that ecosystems with beavers are far healthier, for humans and non-humans alike, than those without them.

Systems biology came about as growing numbers of engineers and scientists from other fields created algorithms which supported the analysis of biological data in incredible quantities. Whereas biologists of the past had been forced to study one item or aspect at a time, due to technical and biological limitations, it suddenly became possible to study biological phenomena within their natural contexts.

Humpback whales are among the most intelligent animals on Earth. Some scientists believe they might even surpass humans in self-awareness, empathy, and communication skills. In this episode, we swim with a whale as he teams up with other humpbacks to use bubbles to catch fish, rescues a sea lion, and puts his own spin on melodies sung by whales across the Pacific Ocean. This is the world in its natural state, defined by seasons, routines, and cycles. By the time this whale is ready to close one eye and go to sleep, you will be too.

When Linda Kohanov wrote The Tao of Equus over twenty years ago, she posed questions that few were asking: Do horses make choices? How do they seem to know what people are thinking and feeling? Are horses spiritual beings? What do they have to teach people? Why are women so attracted to horses? The answers, detailed in this extraordinary chronicle that synthesizes science, behavioral research, and personal insight, transformed how we think about one of humanity's oldest companions and established Kohanov at the vanguard of the emerging field of animal-assisted learning/therapy.

Lakes might be the most misunderstood bodies of water on earth. And while they may seem commonplace, without lakes our world would never be the same. In this revealing look at these lifegiving treasures, John Richard Saylor shows us just how deep our connection to still waters run.

How did the dog become man’s best friend? A celebrated anthropologist unearths the mysterious origins of the unique partnership that rewrote the history of both species.

As one of the most beautiful and intriguing birds found in nature, hummingbirds fascinate people around the world. The lightest birds in the sky, hummingbirds are capable of incredible feats, such as flying backwards, diving at speeds of 61 MPH, and beating their wings more than 60 times a second. Miraculous creatures, they are also incredibly vulnerable when they first emerge from their eggs. That’s where Brenda Sherburn comes in. With tenderness and patience, she rescues abandoned hummingbirds and nurses them back to health until they can fly away and live in the wild.

Know how to navigate, don’t worry about the destination, and stay alert. These are just a few of the strategies that contribute to both successful lion tracking and a life of fulfillment. When we join Boyd Varty and his two friends tracking lions, we are immersed in the South African bush, and, although we learn some of the skills required for actual tracking, the takeaways are the strategies that can be applied to our everyday lives.

To better understand the inner workings of our bodies and to trace the origins of many of today's most common diseases, we have to turn to unexpected sources: worms, flies, and even fish.

Tucked away in Siberia, there are furry, four-legged creatures with wagging tails and floppy ears that are as docile and friendly as any lapdog. But, despite appearances, these are not dogs - they are foxes. They are the result of the most astonishing experiment in breeding ever undertaken - imagine speeding up thousands of years of evolution into a few decades. In 1959, biologists Dmitri Belyaev and Lyudmila Trut set out to do just that, by starting with a few dozen silver foxes from fox farms in the USSR and attempting to recreate the evolution of wolves into dogs in real time.

Whales are among the largest, most intelligent, deepest diving species to have ever lived on our planet. We have hunted them for thousands of years and scratched their icons into our mythologies. They simultaneously fill us with waves of terror, awe and affection - yet we know hardly anything about them. Whales tend to enter our awareness only when they die, struck by a ship or stranded in the surf. They evolved from land-roaming, doglike creatures into animals that move like fish and breathe like us and can grow to 300,000 pounds, live 200 years and roam entire ocean basins. Yet despite centuries of observing whales, we know little about their evolutionary past.

Musician and naturalist Bernie Krause is one of the world's leading experts in natural sound, and he's spent his life discovering and recording nature's rich chorus. Searching far beyond our modern world's honking horns and buzzing machinery, he has sought out the truly wild places that remain, where natural soundscapes exist virtually unchanged from when the earliest humans first inhabited the earth.

Bernd Heinrich involves us in his quest to get inside the mind of the raven. But as animals can be spied on only by getting quite close, Heinrich adopts ravens, thereby becoming a "raven father", as well as observing them in their natural habitat. He studies their daily routines and, in the process, paints a vivid picture of the ravens' world. At the heart of this book are Heinrich's love and respect for these complex and engaging creatures, and through his keen observation and analysis we become their intimates, too.

In the mid-1970s, scientists began using DNA sequences to reexamine the history of all life. Perhaps the most startling discovery to come out of this new field is horizontal gene transfer (HGT), or the movement of genes across species lines. For instance, we now know that roughly eight percent of the human genome arrived not through traditional inheritance from directly ancestral forms, but sideways by viral infection - a type of HGT. In The Tangled Tree David Quammen chronicles these discoveries through the lives of the researchers who made them.