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Not all dinosaurs were enormous like the 84-foot-long, 30-ton Apatosaurus. TheCompsognathus, for example, approximated an eight-pound chicken. Size up two others.
Crisis: Reefs in Crisis The Biodiversity Crisis: Jaguars
There are more than 260 distinct ecosystems in the United States. Yet only a little over half of them are in protected wilderness areas. What does it take to obtain „wilderness status“?
Crisis: Reefs in Crisis The Biodiversity Crisis: Jaguars
Focus on the best books about astronomy, astrophysics, light, telescopes, digital imaging, and the 3-D universe with this list of recommended titles, suitable for older students and adults.
Crisis: Reefs in Crisis The Biodiversity Crisis: Jaguars
The most common fossils are bones and teeth, but not all fossils are body parts. Explore the wide-ranging evidence of ancient life that scientists use to understand Earth’s prehistoric past.
Crisis: Reefs in Crisis The Biodiversity Crisis: Jaguars
Put your scientific skills to the test to see if you can figure out tell by their footprints if dinosaurs were walking, trotting, or running.
Crisis: Reefs in Crisis The Biodiversity Crisis: Jaguars
The idea of launching a telescope into orbit was first suggested in 1923, but the idea wasn’t realized until nearly 70 years later.
Crisis: Reefs in Crisis The Biodiversity Crisis: Jaguars
Scientists on many parts of the globe are working to decipher the family tree of animals at the transition from non-avian dinosaurs to birds.
Crisis: Reefs in Crisis The Biodiversity Crisis: Jaguars
Discovering Sirius B long before technology allowed us to see it, or quantum mechanics explained the nature of white dwarfs.
Crisis: Reefs in Crisis The Biodiversity Crisis: Jaguars
This Nobel Prize–winning scientist contributed to several fields: chemistry, geochemistry, lunar science, and astrochemistry.
Crisis: Reefs in Crisis The Biodiversity Crisis: Jaguars
The notion that enormous rocks exist within our solar system—and that some fall to Earth—once garnered ridicule.
Crisis: Reefs in Crisis The Biodiversity Crisis: Jaguars
