Prior knowledge needed for Avengers: Infinity War includes familiarity with the Marvel Cinematic Universe (MCU) as the film is a culmination of storylines from previous MCU films. Viewers should have an understanding of the Avengers team, their individual powers and dynamics, as well as the Infinity Stones and their significance in the MCU. Knowledge of key characters such as Thanos, Iron Man, Captain America, Thor, and the Guardians of the Galaxy is also important to fully appreciate the film. **

No, 50 animals do not die in Avengers: Infinity War. The movie primarily focuses on the conflict between the Avengers and the villain Thanos, and the majority of the casualties are human or humanoid characters. While there is widespread destruction and loss of life, there is no specific mention or depiction of 50 animals dying in the film. **

No, Captain America's shield was not destroyed in Avengers: Infinity War 2018. Throughout the movie, Captain America continues to use his shield in battle against Thanos and his army. The shield plays a significant role in the fight scenes, showcasing its durability and importance to Captain America's character. **

Yes, one can watch Infinity War without having watched previous films, but they may not fully understand the backstories of all the characters and the events leading up to the film. However, the movie does provide some context and explanations for those who may not be familiar with the previous films. It is recommended to watch the previous films to fully appreciate the depth of the characters and the overarching storyline, but it is not necessary to enjoy Infinity War as a standalone film. **

In mathematics, infinity times infinity is not a well-defined operation, as infinity is not a number but a concept representing something unbounded or limitless. Therefore, it is not meaningful to compare the size of infinity times infinity with just infinity. In the context of cardinality, the cardinality of the set of real numbers is the same as the cardinality of the set of real numbers squared, both of which are considered to be the same size of infinity. **

While it is not absolutely necessary to watch Thor: Ragnarok before watching Infinity War, it is highly recommended. Thor: Ragnarok provides important background information on Thor's character development, his relationships with other characters like Loki and Hulk, and sets up the events that lead into Infinity War. Watching Thor: Ragnarok will enhance your understanding and enjoyment of Infinity War. **

The name of Thanos' glove in Avengers: Infinity War is the Infinity Gauntlet. This powerful glove is equipped with six Infinity Stones, each granting its wielder control over a different aspect of the universe. Thanos seeks to collect all the stones and harness their power to carry out his plan of wiping out half of all life in the universe. **

Infinity War does not have a direct connection to the Marvel Externals. Infinity War is part of the Marvel Cinematic Universe and focuses on the Avengers and their battle against the powerful villain, Thanos. The Externals, on the other hand, are a group of immortal beings in the Marvel Comics who are not directly involved in the events of Infinity War. However, both Infinity War and the Externals are part of the larger Marvel universe and share connections through various characters and storylines. **