The exploration of different eras in time travel. He took readers to various historical and future periods, vividly describing the settings and cultures. For instance, a story might take place in a post - apocalyptic future or a prehistoric age, which was really fascinating.
I think the unique futures and pasts he creates are really memorable. He doesn't just show a simple version of the future or past. Instead, he builds complex and detailed worlds that are full of surprises. For example, in some stories, the future has a very different social structure due to time travel, and this makes the whole story very interesting.
Well, the concept of knowledge and its consequences is quite prominent. In some stories, the discovery of new knowledge either leads to great progress or to dangerous situations. And then there's the theme of alien encounters. Asimov often writes about how humans and aliens might interact, whether it's through cooperation or conflict. The theme of power and control also shows up a lot, especially in relation to who controls the technology, be it humans or the robots themselves.
One key aspect of Asimov's time travel stories is the complex characters. The protagonists usually face moral dilemmas when dealing with time travel. They have to decide whether to change the past for the better or let history run its course.
Definitely the time - heist in 'Avengers: Endgame'. Seeing all the Avengers go back to different points in time was amazing. Tony Stark and Scott Lang's plan was really cool.
The camaraderie among the soldiers is one memorable aspect. They fought side by side, trusting each other with their lives.
Trantor stands out. It's like a behemoth of a city - planet. Just imagine a world completely covered in buildings and infrastructure, a hub of knowledge, politics, and culture in the galactic empire.
In the story of the Spartans at Thermopylae, the most memorable aspect is their unwavering stand. Just a few hundred Spartans held off a much larger Persian army for days. Their sacrifice bought time for the rest of Greece to prepare for battle. It was a symbol of tenacity and loyalty to their homeland.
Unusual friendships are also a big part. For example, the friendship between a goat and a donkey. They would graze together, share the same shelter, and even defend each other from other animals. It shows that animals can cross species boundaries to form strong bonds.
Hari Seldon is very memorable. He's the creator of psychohistory and his grand plan for the Foundation is central to the story. Another is Salvor Hardin. His clever political maneuvers to protect the Foundation in its early days are quite interesting. And then there's The Mule, a powerful and unpredictable mutant who throws a wrench into Seldon's plans.
There's also the character of Elijah Baley. He is a detective in a world where robots are becoming more and more prevalent. His interactions with robots, especially his partnership with R. Daneel Olivaw in solving mysteries, are really engaging. His character shows how humans can adapt to and work with robots in a complex, evolving world. He has to overcome his own prejudices about robots at times, which adds depth to his character.