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2 days ago · Earth, third planet from the Sun and the fifth largest planet in the solar system in terms of size and mass. Its single most outstanding feature is that its near-surface environments are the only places in the universe known to harbour life. It is designated by the symbol ♁.
- Basic Planetary Data
With an equatorial radius of 6,378 km (3,963 miles), Earth...
- The Atmosphere
Earth - Atmosphere, Climate, Ozone: Earth is surrounded by a...
- Planetary Differentiation
Earth - Differentiation, Formation, Structure: Once hot,...
- The Interior
Earth - Core, Mantle, Crust: More than 90 percent of Earth’s...
- The Outer Shell
Earth’s outermost, rigid, rocky layer is called the crust....
- Structure, Composition, Development
Earth - Structure, Composition, Development: The origin of...
- Basic Planetary Data
2 days ago · The modern world may look very different from the world that existed in the time of ancient civilizations, but our modern-day life continues to show the influence of cultures, traditions, ideas, and innovations from hundreds of years ago. Learn more about important historical civilizations, sites, people, and events. Articles.
2 days ago · Africa, the second largest continent (after Asia), covering about one-fifth of the total land surface of Earth. The continent is bounded on the west by the Atlantic Ocean , on the north by the Mediterranean Sea , on the east by the Red Sea and the Indian Ocean , and on the south by the mingling waters of the Atlantic and Indian oceans.
2 days ago · Encyclopedias. The Encyclopedia of Life Sciences provides online access to over 4400 authoritative introductory to advanced level articles in all areas of the life sciences, including cell and molecular biology, genetics, structural biology, biochemistry, and others.
- Enid Karr
- 2007
6 days ago · Scholarly online historical encyclopedias and dictionaries, including military history, the Enlightenment, the Middle Ages, World War II, world exploration, African American history and more.
- Jennifer Dorner
- 2014
3 days ago · Elephants are the largest living terrestrial animals. The skeleton is made up of 326–351 bones. The vertebrae are connected by tight joints, which limit the backbone's flexibility. African elephants have 21 pairs of ribs, while Asian elephants have 19 or 20 pairs.
5 days ago · The World's Largest Automobile Encyclopedia. ALL BRANDS. CONCEPT CARS. SELF-MADE CARS. 14635 BRANDS. 6163 CONCEPT MODELS. 397 SELF-MADE CARS. 2568 BLOG POSTS.
