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Axial MRI section of a human brain post-processed with colors showing the gray matter, white matter, ventricles and calvaria
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Vertebrate Brains: evolution, structures and functions

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black and white puzzle pieces made in 3dImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/black-white-puzzle-pieces-made-3d-943932">Image used under license from Freestock.com</a>
Pretty young woman with smoke and lightbulbs above her headImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/pretty-young-woman-smoke-lightbulbs-head-202962493">Image used under license from Freestock.com</a>
Energy light beam in casual clothes conceptImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/energy-light-beam-casual-clothes-concept-204460720">Image used under license from Freestock.com</a>
male doctor over a white background with a stethoscopeImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/male-doctor-white-background-stethoscope-2289128">Image used under license from Freestock.com</a>
Pretty young woman deciding with sketched arrows above her headImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/pretty-young-woman-deciding-sketched-arrows-194654981">Image used under license from Freestock.com</a>
puzzle pieces on top of each other - 3d render 2Image used under license from Freestock.com<a href="https://www.freestock.com/free-photos/puzzle-pieces-top-3d-render-2-1343349">Image used under license from Freestock.com</a>
Young man standing and thinking with marks overheadImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/young-man-standing-thinking-marks-overhead-194771216">Image used under license from Freestock.com</a>
Pretty young woman deciding with sketched arrows over her headImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/pretty-young-woman-deciding-sketched-arrows-202967953">Image used under license from Freestock.com</a>
Man with green tree head concept on brown backgroundImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/man-green-tree-head-concept-brown-194762765">Image used under license from Freestock.com</a>
Business man looking at question mark sketch on the wallImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/business-man-looking-question-mark-sketch-184522964">Image used under license from Freestock.com</a>
metal puzzle pieces stacked up - 3d renderImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/metal-puzzle-pieces-stacked-3d-render-943955">Image used under license from Freestock.com</a>
Young person thinking with a glowing machine head illustrationImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/young-person-thinking-glowing-machine-head-191832323">Image used under license from Freestock.com</a>
Young man standing and thinking wiht colorful abstract lines overheadImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/young-man-standing-thinking-wiht-colorful-194771201">Image used under license from Freestock.com</a>
Pretty young woman gesturing with lightbulb and paint splashes above her headImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/pretty-young-woman-gesturing-lightbulb-paint-194655029">Image used under license from Freestock.com</a>
puzzle silhouette over a blue background - 3d renderImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/puzzle-silhouette-blue-background-3d-render-2165442">Image used under license from Freestock.com</a>
Pretty young girl thinking with colorful abstract lines overheadImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/pretty-young-girl-thinking-colorful-abstract-194771210">Image used under license from Freestock.com</a>
blue puzzle piece missing in 3dImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/blue-puzzle-piece-missing-3d-943942">Image used under license from Freestock.com</a>
Pretty young woman thinking with tangled lines coming out of her headImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/pretty-young-woman-thinking-tangled-lines-195898595">Image used under license from Freestock.com</a>
Outstanding green piece in a solved white puzzleImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/outstanding-green-piece-solved-white-puzzle-41783464">Image used under license from Freestock.com</a>
Thoughtful young businessman standing and deciding in front of a chalkboard with sketched arrows and lines in different directionsImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/thoughtful-young-businessman-standing-deciding-front-170798810">Image used under license from Freestock.com</a>
colour puzzle pieces over white in perspective - 3d renderImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/colour-puzzle-pieces-white-perspective-3d-1343354">Image used under license from Freestock.com</a>
male nurse portrait over a white backgroundImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/male-nurse-portrait-white-background-6804166">Image used under license from Freestock.com</a>
Young woman standing and thinking with arrows overheadImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/young-woman-standing-thinking-arrows-overhead-184531325">Image used under license from Freestock.com</a>
Pretty young woman thinking with tangled lines coming out of her headImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/pretty-young-woman-thinking-tangled-lines-194654975">Image used under license from Freestock.com</a>
Young girl presenting idea light bulb with green tree conceptImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/young-girl-presenting-idea-light-bulb-194762786">Image used under license from Freestock.com</a>
Business person having an bright idea light bulb conceptImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/business-person-having-bright-idea-light-170064860">Image used under license from Freestock.com</a>
Business man with idea light bulb head conceptImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/business-man-idea-light-bulb-head-170064872">Image used under license from Freestock.com</a>
Young lady drawing a colorful light bulb with colorful splashes on white backgroundImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/young-lady-drawing-colorful-light-bulb-184524500">Image used under license from Freestock.com</a>
Man in suit with glowing dreamy cloudscape conceptImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/man-suit-glowing-dreamy-cloudscape-concept-184524356">Image used under license from Freestock.com</a>
Business men with a multicolour puzzle isolatedImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/business-men-multicolour-puzzle-isolated-38217565">Image used under license from Freestock.com</a>
Energy light beam in casual clothes conceptImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/energy-light-beam-casual-clothes-concept-170881673">Image used under license from Freestock.com</a>
black puzzle pieces in 3dImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/black-puzzle-pieces-3d-943956">Image used under license from Freestock.com</a>
black puzzle pieces in 3dImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/black-puzzle-pieces-3d-943937">Image used under license from Freestock.com</a>
Pretty teenager with heart illustrations circleing around her head Image used under license from Freestock.com<a href="https://www.freestock.com/free-photos/pretty-teenager-heart-illustrations-circleing-head-184524494">Image used under license from Freestock.com</a>
Pretty young woman thinking with tangled lines coming out of her headImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/pretty-young-woman-thinking-tangled-lines-166274558">Image used under license from Freestock.com</a>
Man with green tree head concept on brown backgroundImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/man-green-tree-head-concept-brown-170066156">Image used under license from Freestock.com</a>
Business man in suit with graph and charts exploding from his body conceptImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/business-man-suit-graph-charts-exploding-172094645">Image used under license from Freestock.com</a>
black puzzle in 3dImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/black-puzzle-3d-943933">Image used under license from Freestock.com</a>
Pretty young woman with smoke and lightbulbs above her headImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/pretty-young-woman-smoke-lightbulbs-head-163176728">Image used under license from Freestock.com</a>
Young girl with thunderstorm lightning headache illustrationImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/young-girl-thunderstorm-lightning-headache-illustration-163175393">Image used under license from Freestock.com</a>
Pretty young woman with smoke and lightbulbs above her headImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/pretty-young-woman-smoke-lightbulbs-head-159813014">Image used under license from Freestock.com</a>
balancing puzzle pieces in primary colours - 3d renderImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/balancing-puzzle-pieces-primary-colours-3d-943945">Image used under license from Freestock.com</a>
Energy light beam in casual clothes conceptImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/energy-light-beam-casual-clothes-concept-167273081">Image used under license from Freestock.com</a>
Man in suit with glowing dreamy cloudscape conceptImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/man-suit-glowing-dreamy-cloudscape-concept-170066045">Image used under license from Freestock.com</a>
Thoughtful young woman with thundercloud above her headImage used under license from Freestock.com<a href="https://www.freestock.com/free-photos/thoughtful-young-woman-thundercloud-head-155815298">Image used under license from Freestock.com</a>