App Store

Google Play

{{seriesTitle}} - The book series

Details page - Device banner - 894x1036

Step into an infinite world of stories

Listen and read

Sandra Markle

Panamanian golden frogs aren't just cute, little, and yellow. They're also the national symbol of Panama. But they started to disappear about fifteen years ago. What's killing them? Could it be a change in their habitat? What about pollution? Might it be a result of climate change? Follow a team of scientists working to save these frogs and protect frog populations worldwide in this real-life science mystery.

Millbrook Press

Sandra Markle's Science Discoveries

The Case of Vanishing Golden Frogs: A Scientific Mystery

Honeybees are a crucial part of our food chain. As they gather nectar from flowers to make sweet honey, these bees also play an important role in pollination, helping some plants produce fruit. But large numbers of honeybees are disappearing every year . . . and no one knows why. Is a fungus killing them? Could a poor diet be the cause? What about changes to bees' natural habitat? In this real-life science mystery, scientists and beekeepers are working to answer these questions . . . and save the world's honeybees before it's too late.

The Case of Vanishing Honeybees: A Scientific Mystery

In the cloud forests of the Amazon Basin, scientists are installing extraordinary numbers of camera traps in the hopes of learning more about an elusive species—woolly monkeys.

 No one knows for sure how many woolly monkeys are left in the wild. But they play a key role in their ecosystem, and without them the rain forest is in trouble.

 Join scientists on their quest to solve the mysteries surrounding the lives of woolly monkeys before it's too late.

 Scan QR codes inside the book to see and hear the monkeys!

The Woolly Monkey Mysteries: The Quest to Save a Rain Forest Species

Southern white rhinos are in trouble. For years, a rumor has been spreading that their horns can be used to cure cancer, and poachers have been targeting these gentle creatures. Sandra Markle takes readers behind the scenes to see how civilians, volunteer organizations, and African governments are working together to protect rhinos.

The Great Rhino Rescue: Saving the Southern White Rhinos

Little brown bats do us a big favor. They eat huge numbers of insects! That helps limit the spread of diseases and the damage that insects do to farm crops. But in recent years, large populations of little brown bats have been dying off each winter. Is a virus killing them? Could climate change or pesticides be the cause? Or is it something else? Follow a team of dedicated scientists working to save the little brown bats in this real-life science mystery.

Case of Vanishing Little Brown Bats: A Scientific Mystery

Golden lion tamarins are found only in Brazilian forests. These small, remarkable monkeys once had plenty of space to roam and claim family territories. But years of deforestation caused their numbers to shrink. They were in serious danger of becoming extinct. 

 To help, scientists studied the animals in zoo settings. But they faced several mysteries. Why weren't golden lion tamarins reproducing in zoos? If scientists reintroduced zoo-raised tamarins to the wild, would those monkeys survive? And how could scientists give tamarins enough forest area for the population to grow? Find out how scientists and concerned citizens worked together to give golden lion tamarins a hopeful future.

The Great Monkey Rescue: Saving the Golden Lion Tamarins

Late in 2013, snowy owls started showing up in places no one expected to find them—including Florida. What had caused so many of these majestic birds to leave their Arctic home and fly to southern Canada and the United States? Scientists quickly began working to find out. Author Sandra Markle brings together firsthand reports from the scientists involved along with stunning photographs of the owls to explain this rare event, known as an irruption. Follow along as scientists figure out why snowy owls took part in this unusual migration and discover what they learned from the unexpected opportunity to study them up close.

Snowy Owl Invasion!: Tracking an Unusual Migration

Long ago, Nubian giraffes roamed wild across Uganda.

Over time, as people constructed roads and towns, giraffe habitat and populations shrank. By 2016, nearly all of the country’s two hundred and fifty giraffes were grouped in one area within Murchison Falls National Park. Then a rich oil deposit was discovered there and companies made plans to start drilling, which would make the area unlivable for giraffes.

To preserve their dwindling population, the Ugandan government enlisted the help of a giraffe conservation organization to move a group of giraffes across a river to safer territory. Can they do it in time to keep the giraffes safe?

Book Buddy Digital Media

Lerner

The Great Giraffe Rescue: Saving the Nubian Giraffes

Did you know that rats can be heroes? In the southern African nation of Mozambique, these amazing rats (which are the size of a small house cat) have helped clear landmines. And that's just one of the incredible stories in this book.

Award-winning author Sandra Markle has collected wonderful true stories about animals that have rescued humans—and other animals. With fabulous photographs of the featured animals, this book is sure to appeal to animal lovers everywhere!

Animals to the Rescue!: Amazing True Stories from around the World

Every year in Namibia, about two thousand zebras suddenly disappear from their grazing area along the Chobe River. Months later, the herd returns. Where do they go? And why? Thanks to satellite-tracking collars, scientists were able to solve the mystery, but several questions remain. Award-winning science author Sandra Markle reveals the process scientists used to study the zebras, and she also delves into the science of migration, exploring how animals know where to go, how to get there, and when to leave.

Follow Those Zebras: Solving a Migration Mystery

Acclaimed science author Sandra Markle offers a fascinating look at Gobi bears—the rarest bears on the planet. These adorable animals face threats ranging from illegal gold miners to climate change. Find out more about these bears, which are considered a national treasure in Mongolia, and learn what scientists are doing to help this critically endangered species.

"Markle clearly and efficiently introduces a bear unfamiliar to most North American readers . . . Not a story of salvation but a work in progress, ably explained."—starred, Kirkus Reviews

The Great Bear Rescue: Saving the Gobi Bears

The Case of the Vanishing Little Brown Bats: A Scientific Mystery

In the dark, Kristofer Helgen and a group of scientists peered up into the treetops of the Ecuadorian cloud forest. Staring back at them was a furry, four-legged creature. Could it be the mysterious, wild olinguito?

Helgen had been studying the olingo, a relative of raccoons, for years. As he examined their pelts and skulls in museums, he noticed differences in a few. Through scientific investigating, he realized the different examples weren't olingos at all—he had discovered a completely new species.

Next, he just had to find it—if it still existed. Follow Helgen's real-life science adventure through museums, laboratories, and the cloud forest as he makes an exciting modern discovery.

The Search for Olinguito: Discovering a New Species

African penguins waddle around nesting colonies in lower numbers than ever before. Despite South African government efforts to protect the penguin colonies and their ocean fish supply, young penguins still struggle to survive. Fuzzy chicks waiting for food in open nests may overheat in the sun or become prey. Others simply may not get enough food to survive on their own once their parents leave. But new conservation methods, including rescuing and hand-feeding vulnerable chicks, are giving experts hope. Can volunteers and scientists help save Africa's only penguins before it's too late?

The Great Penguin Rescue: Saving the African Penguins

In 2007 only thirty Amur leopards remained in the wild. Scientists knew they needed to do more to help these big cats. However, details of the leopards' wild lives in their high-altitude forest home were still a mystery. With the help of new technology and the cooperation of scientists and governments around the world, people have learned more than ever before about these rare cats. An innovative plan is under way to give Amur leopards a more secure future. Can these cats rebound from the brink before it's too late?

The Great Leopard Rescue: Saving the Amur Leopards

Golden lion tamarins are found only in Brazilian forests. These small, remarkable monkeys once had plenty of space to roam and claim family territories. But years of deforestation caused their numbers to shrink. They were in serious danger of becoming extinct. 

To help, scientists studied the animals in zoo settings. But they faced several mysteries. Why weren't golden lion tamarins reproducing in zoos? If scientists reintroduced zoo-raised tamarins to the wild, would those monkeys survive? And how could scientists give tamarins enough forest area for the population to grow? Find out how scientists and concerned citizens worked together to give golden lion tamarins a hopeful future.

Intuitive

The Case of the Vanishing Golden Frogs: A Scientific Mystery

The Case of the Vanishing Honeybees: A Scientific Mystery

In the cloud forests of the Amazon Basin, scientists are installing extraordinary numbers of camera traps in the hopes of learning more about an elusive species—woolly monkeys.

No one knows for sure how many woolly monkeys are left in the wild. But they play a key role in their ecosystem, and without them the rain forest is in trouble.

Join scientists on their quest to solve the mysteries surrounding the lives of woolly monkeys before it's too late.

 Scan QR codes inside the book to see and hear the monkeys!

Sandra Markle's Science Discoveries - The book series

Sandra Markle's Science Discoveries - The book series

Sandra Markle's Science Discoveries books in order

Listen and read