Special Agent Fox Mulder was h*ll bent on proving that UFOs (Unidentified Flying Objects) exist — many people have seen things in the sky that they just cannot identify, ranging from aircraft to meteors. Now whether or not any of those objects and lights were specifically alien spacecraft is another matter entirely; given the vast distances and efforts involved in just getting to Earth from across the universe, such a scenario seems unlikely. Still, careful investigation has revealed known causes for most sightings, while some UFO incidents will always remain unexplained.
Why did some mammals turn back to the ocean?
Evolution is one of the most consistent and heralded scientific theories around today and it has survived for numerous years and likely will continue to do so. Still, we are left with some questions. We understand why evolution would bring animals out of the water and onto land, but what would cause the inverse to be true such as what happened with the ancestors of seals? Evolution from within the waters is a much trickier situation and one that doesn’t make sense with our current scientific understanding.