Earth Systems

Everything is going according to plan. Ivan Susanin has successfully installed a beacon in the undead territory and returned home. The situation changes when the next mission to the city of goblins is delayed, while his home planet becomes the battleground. Monsters invade Earth, and Ivan must become one of the leaders and unite the players under his banner, albeit within the borders of his own country. If circumstances demand that he discloses his identity and cooperates with the authorities, so be it! Modern weapons and equipment, instructors, financing, and protection by law....

The only planet to support life, Earth has a lot going for it. Think you know everything there is to know about our home planet? Think again. Discover more about the blue planet we call home.

Erosion changes Earth's natural features. It breaks down materials and can help make something new. Discover why erosion is an important part of nature!

Soil covers most of the land on Earth. It feeds plants and is home to many animals. Discover why soil is an important part of nature!

Different kinds of rocks are found on Earth. Many are found deep inside Earth. Discover why rocks are an important part of nature!

Plants and animals from millions of years ago left behind fossils. Fossils can teach people about the past. They are also used for fuel. Discover why fossils are an important part of nature!

Most of Earth is covered in water. Water falls from the sky as rain or snow. All living things need water to survive. Discover why water is an important part of nature!

Fire is rarely out of the headlines, from large natural wildfires raging across the Australian or Californian countrysides to the burning of buildings such as the disasters of Grenfell tower and Notre Dame. Fire on these scales can represent a serious risk to human life and property. But the advent of fire made and controlled by humans also represented a crucial point in our evolution, allowing us to cook our food, forge our weapons, and warm our homes.

The sun's family of planets become a familiar place in this personal account of the lives of other worlds. Sobel explores the planets' origins and oddities through the lens of popular culture, from astrology, mythology, and science fiction to art, music, poetry, biography, and history. This intimate account is filled with fascination, beauty, and surprise.

The water sprite with roots is personified as a friend who experiences many encounters, imbalances, fears, and hopes in his water cycle journey. Because he shares an affinity with any organic life form derived from carbon and hydrogen, he can communicate with other beings and express their stories from their realities. Most importantly, he talks the walk through his mission of discovering cyclical truths from the sun to water to nutrients to plants to animals to decomposing bacteria to respecting the biodiversity essential for all life.

No one on Earth knows the seeds of the world’s destruction just fell from space. Tiana knows what duty means though. It's why all her friends are dead. Alone on a primitive world. All her all her technology at the bottom of the ocean. Outnumbered by deadly enemies only she can bring to justice. If she fails her mission now, another sentient species will fall. And the Tyrant Empire will rise again - because Earth has just been infected with a fatal parasite.

In 2013, Kate Greene moved to Mars. That is, along with five fellow crew members, she embarked on NASA’s first HI-SEAS mission, a simulated Martian environment located on the slopes of Mauna Loa in Hawaii. For four months she lived, worked, and slept in an isolated geodesic dome, conducting a sleep study on her crew mates and gaining incredible insight into human behavior in tight quarters, as well as the nature of boredom, dreams, and isolation that arise amidst the promise of scientific progress and glory.

In the early days of civilization, we knew nothing about the moon. It was considered as a god chasing the sun in an endless race through the sky. Today, we know much more than our ancestors. We can speculate on the creation of the moon and what the Earth would be without the moon. It turns out that our moon has played a much more important role in life development than anyone would have thought.