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.
1 They are 10 to 100 times smaller than bacteria. 2  The biggest difference between viruses and bacteria is that viruses must have a living host-like a plant or animal-to multiply, while most bacteria can grow on non-living surfaces. Bacteria are intercellular organisms (i.e. they live in-between cells); whereas viruses are intracellular organisms (they infiltrate the host cell and live inside the cell). 2  They change the host cell's genetic material from its normal function to producing the virus itself.