” To this I would answer, “No, not that I’m aware of.” After a while folks started saying: “You should write a book.Because so many of you folks have considered me qualified for such an undertaking, I decided to take your advice.With too many greenhouse gases, Earth would be like Venus, where the greenhouse atmosphere keeps temperatures around 400 degrees Celsius (750 Fahrenheit).The East African peak looms over a modern city as well as three major sites featuring signs of early humans. Links to external sites will be displayed in another window. Select the photographs to display the original source in another window.
So far, land plants and the ocean have taken up about 55 percent of the extra carbon people have put into the atmosphere while about 45 percent has stayed in the atmosphere.
When they get close enough to a planet or moon, they will be pulled in by the large body's gravity and strike the surface at a speed of at least the escape velocity of the planet or moon, i.e., faster than a bullet.
At such speeds, the projecticle explodes on impact and carves out a round bowl-shaped depression on the surface. How can you distinguish an impact crater from a volcanic crater?
There are still small chunks of rock orbiting the Sun left over from the formation of the solar system.
Some of them have orbits that cross the orbits of the planets and moons.