Keep reading to learn more about Earth's different layers, its atmosphere, and what makes the "blue planet" unique. Earth is made out of different layers, and those layers get hotter and more ...

Elizabeth Cottrell collects rocks and analyzes samples in the lab to help reveal what makes Earth so unique Jack Tamisiea Smithsonian research geologist Elizabeth Cottrell collects rock samples ...

Alongside our planet’s oxygen rich atmosphere and plentiful water, the Earth’s continents are part of what makes the planet ... Smithsonian (part of the Our Unique Planet initiative), the ...

Researchers are trying to understand what makes Earth so special ... whether atmospheric evolution and the origin of life on Earth are unique or share common patterns with other planetary systems.