“In the time it would take nature to create a fully matured redwood,” the scientist boasted, “Geneti-Corp can create thousands! This technology will change the world!”

The world was indifferent. Science was science these days, and life-changing technological advancements were as common-place as rain storms, and, for that matter, auto-evaporating layered rain suits. And even though Geneti-Corp was doubling their growth rate year after year, nobody seemed to notice. A tree is, after all, just a tree.

The first batches of young saplings were kept in North America, to replace forests that had been lost to fires. The next batches were shipped to South America and Africa, to replenish now completely dwindled Rain Forests. After that, they were sold to countries everywhere. Lumber shortages ceased to exist and paper supplies were abundant, even excessive.

There was a flaw in the design. An oversight, they said; a catastrophe, they should have said.

All over the world, these genetically modified trees were out of control; their height beyond the clouds, growing ever wider and thicker, and roots going deep into the soil, as deep as they were tall. They pushed their way out of the forest, took over cities, and cast the entire planet into shadow.

They could not be cut, they could not be burned, and they could not be stopped.

This is how mankind was lost. We simply ran out of room.