Yes.
Especially if you are overweight, you may just think its from eating that piece of Pizza when in reality you are 8 months pregnant.
A friend of mine went through her entire pregnancy unaware that she was pregnant! then she went into labor went to the hospital and had her baby!
Of course there are. We as a human species dont know everything.
If there were, we would know about them... so that would make them known.
Terrestrial Planets
Planets, exoplanets, asteroids. They're all sattelites of the sun.
The seasons come because of the tilt of the planets. ( the axis on which it rotates)
The first five planets in the order from closest to farthest are Mercury, Venus, Earth, Mars, and Jupiter. The first four planets are inner planets, and Jupiter is an outer planet.
These planets are Jupiter, Saturn, Uranus and Neptune.
It is Unknown
Scientists predict that they are planets because there wouldn't be random gas' from unknown places
Currently there are 353 known extrasolar planets (that is to say, outside of our solar system), but it is unknown how many planets exist in the universe.
If you refer to creatures from other planets, that is currently unknown.
yes, but as for how many... no one knows since they are unknown lol I hope I answered your question!
Pluto and the unknown planet Falkite (falk-i-tee)
It's easier to ask how many were known, and the answer is six.
Not all, some are unknown and not yet discovered.
If you are asking about "space aliens", as in "lifeforms from other planets", the only honest answer is "Unknown."
that informations is unknown. But hey a guy can dream
It's unknown. We didn't discover a planet with water, and oxygen.
Extraterrestrial are unknown humans. They are humans, but different kinds from different planets. Like aliens and UFOs. The scientific community think this is true. They think they come from planets beyond Earth...