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in reply to When another intelligent species appears on Earth, humanity shall …

Humanity shall do something... But I bet that humanity will do nothing useful, this is not a new history at all

When Dreissena polymorpha appeared first time on USA, the americans did... nothing.

Now, we, humans, can not fight this simple small mussel creating damages of hundreds of millions of dollars in our water and energy resources. Burning two or three billions more each year.

We can't eliminate it. Government plays with glossy drones in some desert of the world.

Frogs, rabbits, ants, birds, rats, minks, jellyfishes... biological invasions occur just right now every day. Sadly we don't care to much about it, look for aliens and simply wait. Then we put tons of money into the new black hole each year

The stupidest form of life can beat us, and it does all the time.