Tired of ending your sentences with a boring period or exclamation point? Try one of these uncommon punctuation marks instead, and impress your grammar-loving friends. Uncommon punctuation marks ...

Blue objects with diffraction spikes are stars ... As of this writing, it was unknown what the "question mark" formation was — though scientists speculated it was one or more galaxies.

the dusty blue nebula which surrounds them, and the galaxies in the background. Experts believe the question mark is formed by two galaxies, sharing the same gravitational field, colliding.

The question mark is actually five copies of the galaxy ... In 1987, an enormous blue arc thought to be hundreds of trillions of miles long was at first considered one of the largest objects ...