Stock Photos: smart old bald

Feeling quite serious when thinking about science
Old professor holding book and looks surprised
Mature man pointing up and looks like explaining something
Smiling old professor holding small blackboard and pointing on it
Who's ready to start study time?
Well, and what we're gonna do about that?
Pensive mature man bitting his eyeglasses
Excited mature professor adjusting eyeglasses
Old professor touching his beard and reading a book attentively
Mature professor seems to don't understand something
Well, and what do you think about this thing?
Getting more familiar with new device
Serious looking mature professor standing with hands folded
Balancing with amount of knowledge
Old professor showing a tablet
Mature man adjusting his eyglasses and looking lost
Old professor standing with his ahnds folded and eyes closed
mature professor looking lost and mad
I just can't go with what's written here
Old professor standing at the table and holding digital tablet
I have some problems with understanding that
Laughing old professor with his eyeglasses on his head
Old professor holding globus and seems bothered with something
Old professor holding digital tablet and seems like saying something
Old professor holding globus and looking hugely distured with something
Oh, how could you say it, it's my favorite book
Taking a closer look on places to visit
Old professor holding tablet with one hand
Laughing mature professor standing with his hands folded and eyeglasses off
Trying to teach students some geography
Mature professor adjusting his eyeglasses
This science decision is not my thing
Quite contented with work result
Old professor holding small blackboard
Laughing mature professor holding his glasses
Serious looking old professor standing with his hands folded
I like to stay on top of things, you know
Old professor seems like saying something and holding a tablet
This digital device is quite a thing
Surprised old professor holding globus and pointing on it
Hm, should i read more books or news already?
Smiling old professor holding a book with hands spread
Serious looking mature professor holding book on his head
Old professor holding a digital tablet and pointing on it
Oh, i didn't see it coming
Well, are you ready to start your learning process?
New generations should learn from this
Mature professor looking confused
Well, it looks like quite new information for me
Serious mature professor adjusting glasses and seems like not understanding something
Information in this book just blows me away
When science work's been just great
Amazed old professor reading a book
Old professor sitting half sideways and using digital tablet
This subject needs a serious consideration
Involved in thoughts old professor holding globus
Old professor holding small blackboard
Thinking about all these work things
Would you take a closer look on this spot?
Old professor hugging globus