Cassius compares it to Caesar
It was unnatural to make money during the era of barter trade where goods were exchanged for other goods.
An owl kills a hawk and two of Duncan's royal horses attack and eat each other. These are unnatural events, and Shakespeare is trying to portray that murder is is unnatural, by including these unnatural events on that same fateful night.
In Shakespeare's "Julius Caesar," Cassius observes several ominous signs that foreshadow trouble for Rome and Caesar's rise to power. He notes the strange behavior of animals, such as an owl hooting during the day and lions roaming the streets, which he interprets as bad omens. Additionally, he reflects on the unnatural storms and the fear exhibited by the public, suggesting that these portents indicate a shift in the natural order, warning of impending chaos. These observations fuel his determination to take action against Caesar.
Good omens that people believe in include seeing a shooting star, finding a four-leaf clover, or hearing a bird sing outside your window. Bad omens may include breaking a mirror, seeing a black cat cross your path, or hearing an owl hoot at night.
Casca is frightened because he witnessed many unusual and unnatural occurrences in Rome, such as a slave's hand burning like a torch but not being consumed, a lion roaming in the Capitol, men on fire walking the streets, and owls hooting during the day. These events are seen as bad omens and are believed to be signs of impending doom.
Natural is the opposite of unnatural.
Good Omens was created on 1990-05-01.
Voices of Omens was created on 2007-02-20.
Good omens were signs of positive outcomes for future actions. The Romans practiced augury, which was a religious cult of reading the omens of the gods. Bad omens signalled that the gods did not approve of the future action. There were many techniques for reading the omens of the gods and there were all sorts of signs.
The omens are all at the zoo and they lead to where the group starts to where they end. Hope I helped!
You need to specify who saw the strange omens if you want to make it possible to answer your question.