The world presents itself in a myriad of colors, and naturally, life takes on a myriad of forms.
Upon first arriving in this new world, the first day was a lesson for all explorers.
Prior exploration information? Earthly common sense? Conventional theories of physical science? Look at this massive yet fragile Tree of the Forest, learning to abandon all past knowledge might be the only constant in an explorer's journey.
Survival of the fittest may not always be the truth in some situations, but adaptation to the environment is one of the principles for most worlds. The peculiar local environment created giants and massive trees ... And when giant trees win the competition of life and expand unchecked and monopolistic, no natural enemies evolve to hold them back.
"This tree, if brought back to Earth..."
"Don't even think about it. It won't survive, and it's not even a Magic Plant."
"But maybe we could collect some seeds and materials and try grafting."