As someone who let's scripture be the final arbiter, there's no indication that life exists on other planets, but there are beings that primarily exist in other dimensions. When I say primarily, there are numerous examples documented in scripture (both OT and NT) where these beings have physically manifested within our four dimensional space.
In Hebrews 13:2, the author (thought to be the Apostle Paul) tells us, "Be not forgetful to entertain strangers: for thereby some have entertained angels unawares."
Surprisingly, this is consistent with current scientific belief that we live in a universe of at least 10 dimensions, although we can only perceive four. If you watch or read interviews with scientists from CERN, they say that one of the goals of their work at CERN is to open portals into these other dimensions. Those involved at the forefront of quantum computing say the reason quantum computing is so fast is that the calculations are actually being performed in these other dimensions where they are free from the constraints of time as we perceive it.
Although I have no interest in trying it myself, I am fascinated by the consistency of the reports from those who have taken DMT who say they've not only seen other beings while in the DMT induced state, but have been able to communicate with them. Interestingly, DMT is a naturally occurring chemical produced by the pineal gland, but in quantities too small to give us the same effect as when taken as a drug.
Many now believe that when eastern religions and new age believers talk about opening the 'third eye', they're referring to this phenomenon. Those who have done so report that this increases their spirituality and ability to hear from ascended masters, spiritual guides and the like, essentially, these same beings.
The pineal gland, about the size of a pea, is actually shaped like a tiny pine cone, the object from which it derives it's name. Throughout recorded history, the pine cone has symbolized man's enlightenment, the third eye, as well as the pineal gland itself. Many religions around the world still use the pine cone in their symbology, including Kabbalah, Catholicism, as well as those involved in the occult.
Biologists know that many of the chemicals we're exposed to on a daily basis, such as chlorine on our drinking water, compromise the functions of the pineal gland which could be an explanation of why we can no longer perceive these beings, and why small children (with less exposure to these chemicals) are often adamant that their 'imaginary' friends are in fact, real, despite the adults around them not being able to see or hear them.
Ancient art from the Sumerians, Assyrians, Babylonians, Incas, and Aztecs often depict winged creatures with bird or reptilian like features holding up pine cones. (Check out any episode of the first few seasons of Ancient Aliens.) Sumerian Cuneiform tablets record that the beings depicted are from other planets, whether that's true, or just the story these beings told the Sumerians is a subject that's has been hotly debated since we learned to read and translate Cuneiform.
The Akkadians, originating in ancient Mesopotamia, the oldest culture on record, and the first culture to use Cuneiform writing, named one of their first cities "Gate of the Gods", the name of this city is where we derive both the words Babel and Babylon. Babel, the Latin translation of the Hebrew word for this Akkadian city, Babylon, the Latin translation of the Greek work for this same Akkadian city.
The Book of Jasher (or The Book of the Upright, as jasher is not a person name, but a transliteration of the Hebrew word for upright), now considered an apocryphal text by Protestant churches and no longer included in Protestant bibles, but still considered canonical by the Catholic, Ethiopian, and Eastern Orthodox churches, still in their bibles, and still considered scripture in Judaism, states that the plan for the Tower of Babel was to reach into heaven to mount a military assault against it and to kill God. "And all these people and all the families divided themselves in three parts; the first said, "We will ascend into heaven and fight against him"; the second said, "We will ascend to heaven and place our own gods there and serve them"; and the third part said, "We will ascend to heaven and smite him with bows and spears." Jasher 9:26 Given that, it's no wonder why God confused their language so they could not complete their task.
Just this week a video surfaced on the inter-webs, that the Navy had to acknowledge was genuine, showing what they term to be UAPs (unexplained aerial phenomena) flying around in ways that no acknowledged terrestrial aircraft are capable of. For years, there have been similar reports, including the ability to suddenly appear and disappear into and out of existence. Given the weight of the evidence, it would seem that these are inter-dimensional craft, piloted by these same inter-dimensional beings.
Are alien (inter-dimensional) beings real? Most certainly, yes. Are they from another planet? Who knows? However, I do believe disclosure to the general public is just beginning and we'll be seeing and hearing much more about them in the years to come and will no longer be able to deny their existence. Are their intentions good or evil? Scripture speaks of angels and fallen angels, so I guess it depends on which one's we encounter.