Hello there! Today, we're going to talk about something called "forward-contamination."
Let's start by imagining our planet Earth is like a giant toy box. All living things on Earth are like little toys in that box. Now let's pretend that we, humans, are like a toy that has gotten a bit dirty. Sometimes we bring germs and diseases with us when we travel between different parts of Earth, just like how some toys might carry a bit of dirt on them when they are moved from one place to another.
This is where forward-contamination comes in. Forward-contamination happens when we bring germs or other living things, like microorganisms, from one planet or environment to another. For example, imagine if we humans decided to travel to Mars, which is a planet that we haven't visited before. If we're not careful, we might accidentally bring some germs from Earth with us to Mars.
This could be a big problem because we don't know if any living things exist on Mars. If we introduce Earth germs to the planet, it could cause harm to any living things that might exist there. Just like if we were to accidentally bring dirt or toys from one toy box to another, it could cause problems for the toys in the new box.
So, in summary, forward-contamination happens when we bring germs or other living things from one environment to another. It's important to be careful when traveling to new places to make sure we don't accidentally introduce any harmful things that could cause problems.