The second largest crater in the world was formed by the impact of a comet according to a 2014 study by researchers in Canada and Ireland. Colliding with Earth almost 1.85 billion years ago, the estimated diameter of the crater is 81 miles (130 km).
How big is a bacteria compared to a human cell? The size of a typical bacterial cell is 0.5-5.0 micrometers, a average human cell is 10 micrometers.8 people found this useful.Edit.he consensus among biologists is that only 5 to 10% of the trillions of cells in our bodies are human. The rest are alien cells: yeast, fungi, bacteria, viruses.
They affect our everyday life, and in fact we could not live without them. Bacteria perform necessary functions for humans; the most important is the breakdown of food in our intestines. The average human actually has around 1.2 kilograms of bacteria in their body. http://www.lifesci.utexas.edu/courses/mcmurry/fall97/13/mattpage.html A normal human being hosts about 1.2 kilograms of bacteria. The bulk are in the gut lumen, and the rest in the skin, oro-pharynx, and genitalia.