If you are a human, then you know what these are. Everybody knows these. And for the first time, an iceberg isn't speaking metaphorically. EVERYBODY should know these. These things make up this planet, and without them, the earth would be nothing, and everything would be nothing.

You are an average human if you know these things, which is just to say your about 80 or so precent of the population. things are still INCREDIBLY known, But there here because they're not as important as the things in tier 1. Or there might be 1 or 2 billion who don't know the majority of these things.

You are a relatively well-informed person if you know these things, placing you in a solid majority of the general public. These concepts, conditions, and creatures are common knowledge in basic pop culture, high school biology, or everyday health discussions. Pretty much everyone has encountered them or heard them brought up in conversation at least a few times in their life.

You have a decent grasp of general science and basic trivia if you are familiar with the items here. While not everyone talks about them every single day, these topics frequently pop up in nature documentaries, health class discussions, or viral internet facts. Knowing these shows you pay a bit more attention to the world around you than average.

You are entering the territory of actual interest in biology, psychology, and nature. The items in this layer step past entry-level facts into slightly more specific topics that require a curious mind or a dedicated dive into wildlife media and psychological disorders. If you know most of these, your science trivia knowledge is definitely above average.

This layer is for the oddities of science, like strange animals, weird diseases, and bizarre conditions. The entry fee here is knowing the weird, wild, and offbeat aspects of nature that usually shock people when they first hear about them. It is the realm of bizarre creatures and medical anomalies.

Just like Layer 5, but it gets significantly stranger, darker, and more obscure. The topics here are parasites, incredibly rare neurological things, botanical survival strategies, and deep-sea creatures. You have to actively seek out biology rabbit holes or weird medical trivia to be familiar with this list.

You are now stepping into specialized knowledge, niche animals, obscure syndromes, and biology facts that sound fake to the untrained ear. The items here are rarely covered in mainstream media and require a genuine passion for natural history, extreme medical cases, or obscure zoological trivia.