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knowledge Stock Photos and Stock Footage

1850 knowledge stock photos are available royalty-free. See knowledge stock videos

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Close up petrified extinct prehistoric fossil remains of Archaeopteryx, a genus of birdlike dinosaurs, transitional between non avian feathered dinosaurs and modern birds
  • Close up petrified extinct prehistoric fossil remains of Archaeopteryx, a...
Back to school chalk handwritten sign over black chalkboard background with wooden frame and copy space
  • Back to school chalk handwritten sign over black chalkboard background with...
female teacher helping students on class about lessons and give support
  • female teacher helping students on class about lessons and give support
female teacher helping students on class about lessons and give support
  • female teacher helping students on class about lessons and give support
Close up hardcover books back edges on retail display of book store or shop
  • Close up hardcover books back edges on retail display of book store or shop
Close up background of ancient Coptic Egyptian stone carved petroglyph hieroglyphs
  • Close up background of ancient Coptic Egyptian stone carved petroglyph...
Stack of six old vintage brown leather hardcover books on table
  • Stack of six old vintage brown leather hardcover books on table
Stack of three old vintage brown leather hardcover books on table
  • Stack of three old vintage brown leather hardcover books on table
books in arabic language on a book shelf
  • books in arabic language on a book shelf
female teacher helping students on class about lessons and give support
  • female teacher helping students on class about lessons and give support
female teacher helping students on class about lessons and give support
  • female teacher helping students on class about lessons and give support
Eugene Burnouf, vintage engraved illustration. Magasin Pittoresque 1861.
  • Eugene Burnouf, vintage engraved illustration. Magasin Pittoresque 1861.
Young Girls walking to school early morning in El-Moez Street
  • Young Girls walking to school early morning in El-Moez Street
female teacher helping students on class about lessons and give support
  • female teacher helping students on class about lessons and give support
Close up petrified extinct prehistoric ammonite fossil spiral shell remains
  • Close up petrified extinct prehistoric ammonite fossil spiral shell remains
Close up stack of six old vintage classic leather hardcover books on table, blue toned, low angle view
  • Close up stack of six old vintage classic leather hardcover books on table,...
Hardcover books back edges on wooden shelves display of retail book store or shop over close up
  • Hardcover books back edges on wooden shelves display of retail book store or...
Male Student Laughing AT College - Handsome Two College Students With Laptop And Books Working In A High School - University Library - Shallow Depth Of Field
  • Male Student Laughing AT College - Handsome Two College Students With Laptop...
Male Student Laughing AT College - Handsome Two College Students With Laptop And Books Working In A High School - University Library - Shallow Depth Of Field
  • Male Student Laughing AT College - Handsome Two College Students With Laptop...
Stack of three old vintage aged and faded hardcover books and several booklets on table close up, low angle view
  • Stack of three old vintage aged and faded hardcover books and several...
A conference. Facsimile of the frontispiece of the tables of the universe and of human knowledge (1802), vintage engraved illustration. Magasin Pittoresque 1875.
  • A conference. Facsimile of the frontispiece of the tables of the universe and...
The vakeel (the lawyer), vintage engraved illustration. Journal des Voyages, Travel Journal, (1879-80).
  • The vakeel (the lawyer), vintage engraved illustration. Journal des Voyages,...
female teacher helping students on class about lessons and give support
  • female teacher helping students on class about lessons and give support
Close up coral pink toned background of old antique vintage earth globe map, high angle view
  • Close up coral pink toned background of old antique vintage earth globe map,...
female teacher helping students on class about lessons and give support
  • female teacher helping students on class about lessons and give support
female teacher helping students on class about lessons and give support
  • female teacher helping students on class about lessons and give support
Vintage books and clock.Retro still life
  • Vintage books and clock.Retro still life
Close up background of ancient Egyptian hieroglyphs written on brown parchment paper, low angle view, selective focus
  • Close up background of ancient Egyptian hieroglyphs written on brown...
Physical plastic and metal 3d model of molecular structure organization
  • Physical plastic and metal 3d model of molecular structure organization
Back to school chalk handwritten sign over black, chalkboard background with grunge rustic wooden frame and copy space
  • Back to school chalk handwritten sign over black, chalkboard background with...
books in arabic language on a book shelf
  • books in arabic language on a book shelf
female teacher helping students on class about lessons and give support
  • female teacher helping students on class about lessons and give support
Back to school white paint handwritten sign over brown parchment paper background with copy space
  • Back to school white paint handwritten sign over brown parchment paper...
An empty school library representing education concept
  • An empty school library representing education concept
Back to school white crayon handwritten sign over green paper background with copy space
  • Back to school white crayon handwritten sign over green paper background with...
female teacher helping students on class about lessons and give support
  • female teacher helping students on class about lessons and give support
Back to school handwritten sign on pink leather cover notebook over blue paper background with copy space
  • Back to school handwritten sign on pink leather cover notebook over blue...
Back to school chalk handwritten sign over green chalkboard background with wooden frame and copy space
  • Back to school chalk handwritten sign over green chalkboard background with...
Young Girls walking to school early morning in El-Moez Street
  • Young Girls walking to school early morning in El-Moez Street
Vintage books and clock on wooden table. Autumn composition.
  • Vintage books and clock on wooden table. Autumn composition.
Young Arabic Student Threatens Teacher At The Classroom In Front Of The Whiteboard
  • Young Arabic Student Threatens Teacher At The Classroom In Front Of The...
Back to school handwritten sign on yellow leather cover notebook over blue paper background with copy space
  • Back to school handwritten sign on yellow leather cover notebook over blue...
female teacher helping students on class about lessons and give support
  • female teacher helping students on class about lessons and give support
3d man sitting on books and working at his laptop
  • 3d man sitting on books and working at his laptop
Hardcover books back edges on wooden shelves display of retail book store or shop over close up
  • Hardcover books back edges on wooden shelves display of retail book store or...
Close up hardcover books back edges on retail display of book store or shop
  • Close up hardcover books back edges on retail display of book store or shop
Male Student Laughing AT College - Handsome Two College Students With Laptop And Books Working In A High School - University Library - Shallow Depth Of Field
  • Male Student Laughing AT College - Handsome Two College Students With Laptop...
3d man sitting on books and working at his laptop
  • 3d man sitting on books and working at his laptop
Back to school white crayon handwritten sign over red paper background with copy space
  • Back to school white crayon handwritten sign over red paper background with...
Young Arabic Student Threatens Teacher At The Classroom In Front Of The Whiteboard
  • Young Arabic Student Threatens Teacher At The Classroom In Front Of The...
female teacher helping students on class about lessons and give support
  • female teacher helping students on class about lessons and give support
Close up background of old antique vintage earth globe map, high angle view
  • Close up background of old antique vintage earth globe map, high angle view
Distributor of Bibles, vintage engraved illustration. Journal des Voyage, Travel Journal, (1879-80).
  • Distributor of Bibles, vintage engraved illustration. Journal des Voyage,...
Young Arabic Student Threatens Teacher At The Classroom In Front Of The Whiteboard
  • Young Arabic Student Threatens Teacher At The Classroom In Front Of The...
Vintage pocket watch on wooden surface
  • Vintage pocket watch on wooden surface
female teacher helping students on class about lessons and give support
  • female teacher helping students on class about lessons and give support
Stack of three old vintage brown leather hardcover books on table
  • Stack of three old vintage brown leather hardcover books on table
Male Student Laughing AT College - Handsome Two College Students With Laptop And Books Working In A High School - University Library - Shallow Depth Of Field
  • Male Student Laughing AT College - Handsome Two College Students With Laptop...
female teacher helping students on class about lessons and give support
  • female teacher helping students on class about lessons and give support
Stack of three old vintage brown leather hardcover books on table
  • Stack of three old vintage brown leather hardcover books on table
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