If sauropods couldn’t lift their necks high–as computer models reveal–how did they get enough to eat?
consume lots of plants–perhaps hundreds of kilograms per
Einstein’s crucial breakthrough, in 1905, can be summed up in a deceptively simple statement: The speed of light is constant.
actual speed of light, which is 300,000 kilometers per
For centuries, physicists thought there was no limit to how fast an object could travel. But Einstein showed that the universe does, in fact, have a speed limit.
Nothing can travel faster than 300,000 kilometers per
Hurricanes have many ways of doing us harm, including high winds, storm surge, and flooding.
near the equator) and has winds of at least 74 miles per
In the developed world, we seldom bear the weight of water.
Dry Lands Getting Groundwater More Crop Per
This prehistoric relative of living ducks had a long neck, tall legs, webbed feet, and a duck-like head.
Prebyornis pervetus Pronunciation: prez-bee-OR-nis per-VET-is
On July 5, 1997, the six-wheeled robotic rover, Sojourner, rolled down a ramp from the Pathfinder spacecraft onto the Martian surface.
geology Range: about 1/3 of a mile Speed: 80 feet per
This extinct bird weighed over 330 pounds and had heavy legs and tiny wings.
Ostriches can sprint to 65 kilometers (40 miles) per
Water: H2O = Life | American Museum of Natural History
Dry Lands Getting Groundwater More Crop Per
Millions of people around the world work in offices. Today, many buildings are designed for low impact on the environment, including the climate.
single one can save about 40,000 gallons of water per
