Mari Bolte

"Our solar system is more than 6 billion years old. Scientists believe there was life on Mars 4 million years ago. Many people on Earth believe they are the only life forms in the universe. But, with millions of undiscovered planets out there, can that really be true? Find out how life began on Earth, how far humans have come in a short period of time, and how we might measure up to other worlds"-- Provided by publisher.

Our solar system is more than six billion years old. Scientists believe there was life on Mars four million years ago. Many people on Earth believe they are the only life forms in the universe but, with millions of undiscovered planets out there, can that really be true? Find out how life began on Earth, how far humans have come in a short period of time, and how we might measure up to other worlds. Includes 21st Century Skills and Content, sidebars, activity, table of contents, index, and glossary.

Searching for signs of alien life is nothing new. Since the first believer, people have wanted to communicate with whatever might be out there. Learn about the satellites and observatories being used today to send and receive signals from space and find out if anything has responded to our call. Includes 21st Century Skills and Content, sidebars, activity, table of contents, index, and glossary.

In 2017, a huge rocky formation was spotted moving through space, defying science's understanding of natural motion. Researchers called the rock 'Oumuamua. Two years later, a similar formation was found. Could the rocks have been made by intelligent life? And is this the first time we've seen something out of this world? Space is full of mysteries--and we're here to solve them. Includes 21st Century Skills and Content, sidebars, activity, table of contents, index, and glossary.

Water nourishes us. It keeps us clean. It makes our planet livable. And, with the help of science, water will play a role in saving all of us. STEM to the rescue Scientists, inventors, and innovators have been working to think of ways to use the ocean's natural resources. Learn all about water and what it can do for us. Readers get an up-close look at what the most brilliant minds in science are doing. And an activity and discussion questions challenge students to think into the future themselves.

Climb high into the peaks and escape to a rustic log cabin retreat. Learn about everything the mountains have to offer by discovering some of the greatest places to go off-grid. Where are some of the most popular places to live "wild?" Who calls those mountains home now? And what does it take to survive there? Readers will learn about survival techniques, real-life locations, respect for local culture, and the indigenous peoples who lived there first.

Thirsty for adventure? Take in everything the desert has to offer by learning about some of the greatest places to go off-grid. Where are some of the most popular places to live "wild?" Who calls the desert home now? And what does it take to survive there? Readers will learn about survival techniques, real-life locations, respect for local culture, and the indigenous peoples who lived there first.

The sun shines bright over our planet. It gives plants and animals life. And it might be the answer to life on Earth lasting even longer. STEM to the rescue Scientists, inventors, and energy experts have been working to think of ways to harness the sun's power. Learn about all the ways the sun has aided technological advances in the past, and how it plays a part in our future. Readers get an up-close look at what the most brilliant minds in science are doing. And an activity and discussion questions challenge students to think into the future themselves.

Air pollution, deforestation, greenhouse gases, plastic everywhere--these things put us, and our home planet of Earth, at risk. But there's hope. STEM to the rescue Scientists, inventors, and world leaders have been working to think of ways to turn our planet green again--and plants may be the answer. Learn about all the ways plants have helped us in the past, and how they play a part in our future. Readers get an up-close look at what the most brilliant minds in science are doing. And an activity and discussion questions challenge students to think into the future themselves.

The Pentagon is the headquarters of the United States Department of Defense, the head of our military operations. It's come under fire for keeping mysterious secrets under wraps--including possible proof of alien life. Find out what other out-of-this-world information the government has possibly kept hidden. Includes 21st Century Skills and Content, sidebars, activity, table of contents, index, and glossary.

We're not alone in the universe; Earth is just one tiny planet in the vast cosmos. Biologists are searching the skies for signs of life, from tiny microbes to supersmart sci-fi societies, discovering what else is out there lies just beyond the stars. Space is full of mysteries--and we're here to solve them. Includes 21st Century Skills and Content, sidebars, activity, table of contents, index, and glossary.

Volodymyr Zelensky got his start as a comedic actor, running for president of Ukraine as a populist candidate in 2019. He seemed an unlikely hero, yet he quickly revealed his resolve as Russian forces invaded Ukraine in 2022. He remained in Ukraine's capital, delivering rousing speeches to Ukraine's people via video even as Russia's troops posed an enormous threat to his safety. Zelensky has become a symbol of great bravery, both in Ukraine and around the world.

Volodymyr Zelensky first gained the spotlight as an entertainer, not a politician. A comedian and actor, he starred in a Ukrainian television show about a teacher fed up with government corruption who unexpectedly becomes president of the country. Then Zelensky ran for president of Ukraine in real life and won, taking office in May 2019. He seemed an unlikely hero, yet Zelensky revealed the depth of his strength and resolve when Russian forces invaded Ukraine in 2022. He remained in the country's capital, even at enormous threat to his safety, delivering rousing speeches via video and devising a defense. Zelensky has become a symbol of great bravery around the world. Learn more about his life, his background, and his unwavering devotion to Ukraine.

The polar regions are very cold and very windy. There is snow and ice everywhere, but I love my home. My feet help me walk on the slippery ice, but I am not a penguin. My thick fur keeps me warm but I am not an Arctic fox. What animal am I? Read the clues and guess