How did the publc learn about Evos in the Five Years Gone timeline?
In my view, the government could have easily covered up the New York incident by claiming a terrorist attack using a nuke. There was no one nearby to witness it. While it was a setup that could have been thwarted if Nathan, his mother, and others had chosen to act, they weren't required to disclose the Evos unless it was part of their plan. In which case, I missed that detail. From what I recall, they intended to use the New York events to reshape the world in line with their own goals, but there was no need for them to reveal themselves.