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.
Bacterial cells. Structure of a salmonella bacterium cell. A bacterium is a single-celled organism [organism: A living being-plant, animal, fungus or bacterium. ] . A bacterial cell has a different structure to an animal or plant cell.tructure of a salmonella bacterium cell. A bacterium is a single-celled organism [organism: A living being-plant, animal, fungus or bacterium. ] . A bacterial cell has a different structure to an animal or plant cell.