The Grey's have always been with us and they're terrestrial and live underground, they are not aliens. Evidence shows the Grey's might have moon bases on the dark side underground, but we're not sure. Cattle mutilations have been occurring since the 1940's or even before that. Near as we can tell they're interested in our big land animals- reproductive and genetics, and maybe the safety of our food source. Grey's have rules and regulations just like us...there are good Greys (helpful w/ hands-off policy or invisible helpful ones hands on policy) but then there are the rouge Greys (that abduct people floating them in a traced sleep and float up cattle to be tested and worked on).
Right now in our skies...there are advanced technology craft hanging all over our the skies and over cities...but you never see them, they're cloaked, invisible. Few times when their systems fail we see them or worse airplane noses and wings hit them while flying. The Grey's tag and monitor us.
Think about it...if you were an advanced race....and saw these huge land animals that were the food source of humanity on Earth...you'd be interested in collecting samples and data every few decades on the evolution of cattle and the DNA quality-safety.
It's normal and there's not much anyone can do about it. Someday in our future they might have reparations- monies to offset proven mutilations...but not today. I know a lot about Greys because my sister was taken many times over her life and I was taken once at age 8 or 9. I'll post the story of what I saw and learned if anyone's interested. Posting from from Cattle to Terrestrial Greys...wow.
....But there's a really neat thing about our moon...it sounds crazy....but there's lots of historical written evidence that the moon showed-up out of the blue magically 10,000 to 13,000 years ago and changed the seasons and tides on the Earth. Our moon might be hollow with sophisticated controls inside. As it's mathematically impossible for the moon's orbit to be as it is and not migrate away faster from us or fall into the Earth. Our moon started changing and controlled our atmosphere and tides about 13,000. year ago....stabilized the Earth and it's seasons...literally as we know it. The moon is extremely beneficial, wonderful changes happened once it showed up magically ...but how did it get there? Look at the math of the moon's size and distance to the Earth and sun...it's orbit....so many numbers ARE aligned (equated to 4) nice perfect eclipses..cycles. Was it God's hands or some other advanced handiwork controls. The Apollo crew did not look too happy or RELAXED during briefings; They had to maintain the narrative and keep quiet about much of the incredible stuff the learned and saw on the moon. Alright wrote enough ...¡Hasta luego!