We’re not alone in space

In 2020, we learnt there were organisms on Mars billions of years ago. Scientists were amazed. There were two possibilities: either our solar system was special enough to support life on planets outside the golden zone, or life was incredibly common.
Scientists knew there wasn’t anything special about our solar system. We were several large rocks spinning around a star, the same as any other.
And if life was so common that we found two instances in one solar system, how many could there be out in the never ending universe?
Why hadn’t we made contact with any?
Our questions were answered quickly. Radars started beeping, missiles fell from the sky, deep, skull-trembling noises filled our ears.
We weren’t alone. Other life forms were just hiding.
And we were naive enough to broadcast our existence to entire space.