"Why shouldn't plants evolve the same way on another planet?"

It still is unclear exactly why plants have mostly evolved to be green.

Plants and animals have evolved that couldn't survive anywhere else.

Plants have evolved a great number of defense mechanisms to protect themselves from predators and disease.

The Earth has experienced a constantly changing climate in the time since plants first evolved.

But plants evolved on Earth earlier than we did, and have adapted to more niches.

Here, plants evolve that have resistance to high levels of metals in the soil.

During the next 75 million years, plants evolved a range of more complex organs, such as roots and seeds.

Many plants have evolved to appear like other organisms, most commonly insects.

"It's as if plants evolved on Mars, and animals here."