Even if Earth were lifeless, its atmosphere and oceans would make it look pale blue. However, if it were to lose its magnetic field, Earth might look more like Venus or Mars (a nondescript brown) because the solar wind would remove the atmosphere and oceans. Life that began on Ear...
could be alone in the universe. The first reason Earth was able to become this welcoming blue sphere is because it's at just the right distance from the Sun, in a narrow zone not too hot and not too cold, where the temperatures are compatible with liquid water and life....
Have you ever wondered what could happen if all human beings were suddenly wiped from the face of the Earth? Even though this scenario seems impossible, throughout history, humans have faced events that have threatened large portions of the population, such as the Black Death in the 14th centu...
This can be used to find out what the climate was like before, during, and after dinosaurs became extinct. But unlike other scientists, paleontologists cannot go into a laboratory and repeat experiments. They can only untangle history by examining fossils. Unfortunately, there is not enough ...
these links should hold throughout Earth’s history. For instance, a recent study72concluded that evolving ocean temperature through the Cenozoic, in modulating the flux of organic matter to the ocean floor, was important in accounting for observed trends in the bulk composition and carbon isotopic...
Here’s a look at what these weather events are, why they happen, and whether scientists think they’re getting stronger.
Humans are adapted to living on Earth-like-sized planets but would struggle on larger planets. On a planet that was smaller than Earth, a person would be able to lift heavier objects and jump higher. If the person does not exercise and keep the body mass, they may struggle when they ...
But his studies gave him an idea about why rivers started to change-he hypothesized it had to do with the spread of plant life on Earth. Female student: So, there was no plant life before 450 million years ago? Male professor: Very little according to fossil records. Anyway, geologists ...
British history before that time is largely undocumented. In 55 BC and 54 BC, Britain was twice invaded by Roman troops led by Julius Caesar and was invaded again by the Romans under Claudius I(克劳狄一世) in 43 AD. Britain subsequently became a Roman province and remained so until the ...
and Geophysical Methods to the Earth’s Surface and Shallow Subsurface CharacterizationAdvances in Remote Sensing Applications for the Detection of Biological InvasionsAdvances in Remote Sensing for Archaeological HeritageAdvances in Remote Sensing in Coastal GeomorphologyAdvances in Remote Sensing of Agriculture...