And in each of those sentences, the word “literally” is wholly unnecessary. It can be omitted and the sentence would be more correct. The first would be a clear statement of opinion rather than (obviously un-) observed fact. There is some wiggle room for how technically correct the second one is, but when “literally” also means “metaphorically” the second sentence as written is even more vague – additional context, e.g. the scientific knowledge of the speaker, is necessary.