In a futuristic world, some humans have to turn into marine life known as sushi to survive outer space. Sushis are the underclass of human society, and when a young human female researcher working in outer space wants to become a sushi, she faces pushback from the human government.

In 1975, a meteor shower brings hundreds of invasive alien plant species to Earth, who quickly take hold of local ecosystems. A scientist grows up and grows old amid the fallout.

An older Indian man recounts his story of "alien" encounters on Mars during Saturday tea.

When an alien spaceship lands on Earth in need of help, leaders of countries around the world help and house them, causing tension between humans and these costly guests.

When aliens land on a planet new to them, they find a population obsessed with a virtual reality and uninterested in the intense beauty of the natural world around them.

In the very far future, a woman takes the chance to leave Earth and look for a new planet to settle on. However, each time she's awoken from her stasis pod, she's confronted with the choice of whether to settle on an increasingly unfamiliar and strange planet that will force her to adapt into something non-human or whether to go back to sleep for thousands of years more, hoping for something better.

Aliens land peacefully on Earth and promise to fix humans’ societal problems, but humans soon get so frustrated with them that they flee to other planets. The smaller Earth population ends up bringing positive change, but this emigration to other planets reveals that many other populations have fled these aliens for the same reason.

At a space frontier, infected humans are turning into alien moth creatures and the government considers mass executing them all. A scientist who has seen signs of the moths' intelligence must fight for their lives.

Two assistants on a distant planet rebel against their captain, who is a naturalist, and plan to leave him stranded. The naturalist studies the local creatures and devises a plan to create a diversion, allowing him to regain the ship and control.

A group of nine explorers volunteer to survey extreme planets, but they are disharmonious because one of their members is a prickly empath. On their journey, they encounter a planet where the only living things seem to be the plants...until the empath is attacked, and they start to wonder if there is other life on the planet.