Do aliens exist? The ancient Greeks thought so and so should you

iStock [{ "selector": ".uzimb-a", "duration": "250ms", "fill": "forwards", "delay": "750ms", "keyframes": [ {"offset": 0, "opacity": 0}, {"offset": 1, "opacity": "1"} ] }]

When it comes to aliens, everyone has an opinion despite no one having much of anything concrete to go on.

Do aliens exist? That is the million-dollar question, isn't it?

We've discovered thousands of exoplanets in the past 30 years, and we haven't heard a peep one way or the other.

iStock [{ "selector": ".icaxf-a", "duration": "250ms", "fill": "forwards", "delay": "750ms", "keyframes": [ {"offset": 0, "opacity": 0}, {"offset": 1, "opacity": "1"} ] }] Learn More

Dr. Jenna Crowe-Riddell

iStock [{ "selector": ".lqlpk-a", "duration": "250ms", "fill": "forwards", "delay": "750ms", "keyframes": [ {"offset": 0, "opacity": 0}, {"offset": 1, "opacity": "1"} ] }, { "selector": ".lcgkx-a", "duration": "250ms", "fill": "forwards", "delay": "750ms", "keyframes": [ {"offset": 0, "opacity": 0}, {"offset": 1, "opacity": "1"} ] }] Learn More

The Search for Extra-Terrestrial Intelligence Institute has been scouring the skies for radio signals from intelligent civilizations for decades now.

iStock [{ "selector": ".jkrpk-a", "duration": "250ms", "fill": "forwards", "delay": "750ms", "keyframes": [ {"offset": 0, "opacity": 0}, {"offset": 1, "opacity": "1"} ] }] Learn More

Aliens could and will look like just about anything you can imagine, given the nature of their evolution and development (should they exist).

iSock [{ "selector": ".jnfnd-a", "duration": "250ms", "fill": "forwards", "delay": "750ms", "keyframes": [ {"offset": 0, "opacity": 0}, {"offset": 1, "opacity": "1"} ] }] Learn More

There is a theory in evolutionary biology called convergent evolution.

solarseven/iStock iStock [{ "selector": ".irzjb-a", "duration": "250ms", "fill": "forwards", "delay": "750ms", "keyframes": [ {"offset": 0, "opacity": 0}, {"offset": 1, "opacity": "1"} ] }] Learn More

STAY UP-TO-DATE ON THE LATEST ENGINEERING NEWS

[{ "selector": ".sqtak-a", "duration": "500ms", "fill": "forwards", "delay": "500ms", "keyframes": [ {"offset": 0, "opacity": 0}, {"offset": 1, "opacity": "1"} ] }, { "selector": ".ptpue-a", "duration": "500ms", "fill": "forwards", "delay": "1000ms", "keyframes": [ {"offset": 0, "opacity": 0}, {"offset": 1, "opacity": "1"} ] }, { "selector": ".qrwro-a", "duration": "500ms", "fill": "forwards", "delay": "2000ms", "keyframes": [ {"offset": 0, "opacity": 0}, {"offset": 1, "opacity": "1"} ] }] Learn more

Do aliens exist? The ancient Greeks thought so and so should you

BY JOHN LOEFFLER

SCIENCE

When it comes to aliens, everyone has an opinion despite no one having much of anything concrete to go on.

SCIENCE

Do aliens exist? That is the million-dollar question, isn't it?

SCIENCE

We've discovered thousands of exoplanets in the past 30 years, and we haven't heard a peep one way or the other.

SCIENCE

Dr. Jenna Crowe-Riddell

If we just look at the question of probabilities, then it seems like madness to doubt the existence of aliens.

SCIENCE

The Search for Extra-Terrestrial Intelligence Institute has been scouring the skies for radio signals from intelligent civilizations for decades now.

SCIENCE

Aliens could and will look like just about anything you can imagine, given the nature of their evolution and development (should they exist).

SCIENCE

There is a theory in evolutionary biology called convergent evolution.

SCIENCE

More in the article.

SCIENCE

STAY UP-TO-DATE ON THE LATEST ENGINEERING NEWS

SWIPE UP TO GET STARTED