It is important to note that scientific knowledge is provisional and subject to change as new evidence and discoveries emerge. Therefore, it is challenging to identify an absolute fact about the Earth that can never be proven wrong. However, there are fundamental scientific principles and widely accepted observations that form the basis of our understanding of the Earth. Here's an example:
The Earth exists: It is generally accepted that the Earth is a physical object that exists in the universe. This is based on direct observation and evidence from space exploration, satellite imagery, and countless scientific studies. While our understanding of the Earth's composition and characteristics may evolve, the basic premise that the Earth exists is widely supported.
Again, it is important to approach scientific knowledge with a mindset of openness to new evidence and potential revisions to our understanding. Science is a self-correcting process, and our understanding of the Earth continues to develop as we gather more information.