How Far Would All Earth's Bacteria Stretch If Stacked Up?

💡 The Answer

• Earth is home to an estimated one trillion species of microbes, most of which remain undiscovered.
• If all bacteria — each around 0.001mm long — were stacked end to end, they would stretch 10 billion light-years.
• This chain could wrap around the entire Milky Way galaxy more than 20,000 times.
• Bacteria are the most abundant life forms on Earth, outnumbering all other organisms combined.