I believe the universe is 13.8 billion years old. Possibly longer, or possibly shorter. Correct me if I'm wrong.
Cross over? i have no idea lol
I really think that its the second one; Nihilist
There's an approximate 0.696% chance that one of those donors is a universal donor.
Explanation:
Seawater is a complex mixture of 96.5 percent water, 2.5 percent salts, and smaller amounts of other substances, including dissolved inorganic and organic materials, particulates, and a few atmospheric gases.
hope this helps!!