If you are refering to them turning into stone when you arent looking at them, they are quantum locked.
The Time of Angels/Flesh and Stone.
They don't they believe in angels not weeping angels
They are also known as the Lonely Assassins.
Weeping Angel
Yes. There is a Doctor Who book called "Touched By An Angel", featuring the Weeping Angels. The ISBN is: ISBN-10: 1849902348 ISBN-13: 978-1849902342
No the weeping angels weren't known before doctor who
yes, the weeping angels will be after the daleks. the angels will be in a 2 parter and after the angels, the next monster will be vampires
no body knows but it might be explained ...one day
If the weeping angels or lonely assassins catch you, they will pull you back in time or break your neck
weeping angels first appeared on the episode "blink" on the ninth of june 2007.
LOTS
no