Science
Related: About this forumOur universe may have a twin that runs backward in time
By Paul Sutter published about 9 hours ago
An anti-universe running backwards in time could explain dark matter and cosmic inflation.
A wild new theory suggests there may be another "anti-universe," running backward in time prior to the Big Bang.
The idea assumes that the early universe was small, hot and dense and so uniform that time looks symmetric going backward and forward.
If true, the new theory means that dark matter isn't so mysterious; it's just a new flavor of a ghostly particle called a neutrino that can only exist in this kind of universe. And the theory implies there would be no need for a period of "inflation" that rapidly expanded the size of the young cosmos soon after the Big Bang.
If true, then future experiments to hunt for gravitational waves, or to pin down the mass of neutrinos, could answer once and for all whether this mirror anti-universe exists.
More:
https://www.livescience.com/mirror-universe-explains-dark-matter
2naSalit
(91,226 posts)Pobeka
(4,999 posts)sanatanadharma
(4,026 posts)A Universe running time backwards, awkward.
Effects would precede causes.
old as dirt
(1,972 posts)Effects would precede causes.
Entropic Time (Backwards Billy Joel Parody) | A Capella Science
leighbythesea2
(1,205 posts)Called Times Arrow. Time went backwards. Fascinating story, & made you think.
keithbvadu2
(39,385 posts)Angleae
(4,625 posts)Yes I did. The animated series episode "The Counter Clock incident."
https://en.wikipedia.org/wiki/The_Counter-Clock_Incident
PufPuf23
(9,231 posts)Counter Clock World.
>>Time has begun moving backward. People greet each other with goodbye, blow smoke into cigarettes, and rise from the dead. When one of those rising dead is the famous and powerful prophet Anarch Peak, a number of groups start a mad scramble to find him firstbut their motives are not exactly benevolent, because Anarch Peak may just be worth more dead than alive, and these groups will do whatever they must to send him back to the grave.
Tadpole Raisin
(1,360 posts)Javaman
(62,959 posts)and if you rise from the dead, do you already know everyone and have all your lifes memories?
would their still be a religion based on someone dying on a cross?
with war does everyone get unshot?
PoindexterOglethorpe
(26,218 posts)Paul Sutter has a couple of books out there that I highly recommend. "Your Place in the Universe" and "How to Die in Space." I have read the second, one, have the first one and will get to it at some point. I really, really recommend "How to Die in Space" in no small part because it's very clear, concise, and fact-filled about how dangerous it really is once you get off this planet. He also makes it clear that using wormholes to travel vast distances just isn't going to be possible. Oh, and he's not just some dry scientist. He's very snarky and there's lots of humor in at least that second book.
I would really like to meet him some day.
SCantiGOP
(14,136 posts)You start out old and confused, end up years later as a kid who just gets to play and becomes less and less aware of what's going on, and then finally.............you end as an orgasm.
Uncle Joe
(59,741 posts)it would be "Forward to the Past!" but we wouldn't know about it at this stage because that reality hasn't reached 1885 yet for the full trilogy.
Fascinating
Thanks for thread Judi Lynn