for an individual, no
for a species, yes the DNA in individuals of a given species does contain information about the evolutionary past of that species
No, at least, that doesn't seem likely. The information "is somehow there", but not in a way that can be recovered systematically. Of course, in special cases, you can deduce something about the past.
I don't think that it's possible to do that.
No, it is not possible to change the past. Once the fabric of time has been woven it is irrevocable. The present is the product of the past.
The distant universe is seen as it was when the light we see now left it, this is as much as 13 to 15 billion years ago.
Yes. That's what telescopes allow (and require) that you do. The reason is that the speed of light is finite, so you never see "now", but what happened in the past.
Even with "new physical laws", either the molecules or some sort of information would have to go back in time, to travel the past.
The universe was hotter in the past due to the Big Bang event which marked the beginning of the universe. As it expanded and cooled over time, galaxies, stars, and planets formed.
Measuring the current density of the universe is important because it helps us understand the distribution and composition of matter in the universe. By studying current density, we can learn about the evolution and structure of the universe, including the role of dark matter and dark energy in shaping its properties. This information is critical for developing accurate models of the universe's past, present, and future behavior.
no one knows
"Molecules" have no memory about "past events", and even if they did changing that information would not have any effect other than changing that information.Here's an example: complex arrangements of matter CAN does contain some information about its past. For example, by looking at a dime you can tell that at some point it was struck by a die, which resulted in the particular imprint in the metal you see (Roosevelt's head). You can take a hammer and beat the dime until the portrait is obliterated, but that still doesn't change the fact that it was there at one time, it just means anyone who sees it in the future will have a harder time determining that.
Scientist speculate there may be theoretically, but there is no evidence that there is any universe other than this one.
Mysterious Universe - 1994 Keys to the Past 1-7 was released on: USA: 7 March 1994