Hypothesis
Man holding guitar standing by tree trunk in forest
A teenage girl in a bright yellow sweater is sitting in a camping chair on the shore of the lake
Man using phone while standing against wall
Confident woman exercising at gym
Woman sunbathing inside a building
Stylish young ethnic female athlete in protective glasses looking at camera on snowy roadway in sunlight
Kids walking in school
Crumpled sheet of paper on a green background, shape of a light bulb. energy saving concept, new
Male professional greeting mature businessman with handshake during seminar at convention center
Portrait of doctor holding blood sample at hospital
Close up middle age woman with willow branches crown portrait picture
Close-up of test tubes on table
Silhouette man standing on beach against sky during sunset
Close up photo of the metal machine in the laboratory
Woman holding digital tablet while standing in meeting at library
Interior of illuminated bathroom
High angle view of man working on table
Creative businesswoman sharing ideas with team in modern office
Man looking at camera
Confident asian athletic woman in sportswear sitting on stadium seat while resting after workout and looking away
Man standing against wall
People working in office
Side view of cropped unrecognizable focused young female entrepreneur in formal wear sitting at table with laptop and cup of coffee and writing information in notebook while planning working day at workplace at home
Scientist working in laboratory
Dark green leaves pattern background beautiful leaf pattern for wallpaper and backdrop.
Unhappy pensive young female in black wear leaning on hand and thinking about personal problems while sitting against brown wall
Concept, idea, light bulb growth illustration
Empty seats in room
Young woman artist drawing in spiral notebook while sitting next to easel
Portrait of male standing at harbor in city during sunset
Close up of screw
Young man with dark hair in trendy clothes with suitcase and shopping bags walking near modern airport in sunny day
Midsection of man using mobile phone
Scientist wearing eyeglasses using digital tablet while standing with coworker in background at laboratory
Portrait of young man
Digital composite image of railroad track seen through man hands
Touching craft cut out paper
Doctor preparing syringe in hospital
Light trails in star shape covering man face at night
Midsection of woman holding paper with text on white table
Portrait of young woman against empty wall
Close-up of water falling from animal sculpture
Young blonde woman bird watcher looking through binoculars at cloudy sky ornithological research
Mid adult woman using computer at home
Rear view of woman sitting on rock by lake
Confident senior man in suit talking through smart phone while walking on footpath against sky
Serious multiracial females wearing trendy clothes and protective masks standing near building on street and speaking on cellphones during coronavirus pandemic
Portrait of confident woman at home
Confident fashion model dancing on black background
Heterosexual couple carrying wooden plank in backyard
Spiritual coach sending positive thoughts hand gesture
Young millennial woman typing on laptop. working at home, freelancer job concept, dynamic workplace.
Midsection of businessman working at office
A pyramid of stones on the seashore. cobblestone tower. philosophical themes
Portrait of confident woman listening music while standing on bridge
People in room
Coworkers working over coding while eating pizza at workplace
Portrait of smiling doctors gesturing while standing at hospital
Portrait of man with eyeglasses
Portrait of woman against window
Rear view of woman against sky
Young person working on laptop while distance learning in the evening
Male entrepreneur discussing with female colleague over document at office
Mother assisting daughter in studies at home
Woman standing in front of refrigerator in cafeteria
Confident black female with braids in casual outfit looking away and browsing smartphone while standing near glass wall
Legal colleagues planning over laptops and documents at conference table in law office
Woman using mobile phone while sitting on window
High angle view of female lawyers using technologies at table in library
Calm fit female in sports bra and leggings standing on beach and preparing for training while touching hair
Powerful fighter ready for boxing match
Full body of young self esteem ethnic female with long dark hair in stylish outfit sitting on metal railing near modern building and looking at camera
Hand of a child holding model airplane
Full length of woman jumping over huddle
Woman talking over phone while wearing protective workwear seen through glass window
Girl looking at object through magnifying glass while sitting at table
Slim female athlete in sportswear doing exercises with elastic band while standing near metal fence during workout in city and looking at camera resist
Portrait of young woman reading book
Empty kitchen at home
Midsection of detective repairing mobile phone on table
Male professional shaking hand with senior man in law library
Side view of confident male athletes practicing with medicine ball and pumping abdomen muscles in spacious sports center
Midsection of business colleagues working at office
Contemplative young hipster male in stylish coat and hat standing in grassy field near metal electric tower and looking away thoughtfully while spending autumn day in countryside
Midsection of coworkers discussing at desk in office
Close-up portrait of confident young woman at beach during sunny day
Portrait of young woman smiling outdoors
Young millennial woman typing on laptop. free lancer working at home, day light dynamic workplace.
Side view of woman wearing mask
Smiling businessman discussing business plan with colleagues in meeting at board room
Midsection of business colleagues working on table
Scientist choosing microscope slide while standing at laboratory
Young woman artist drawing in spiral notebook
Group of bikers in black leather jackets and helmets riding powerful motorcycles on asphalt road leading between green forest in countryside
Christmas tree in the snow on a pink background. minimalism. the concept of the new year
Low angle view of woman wearing mask applying face pack
Confident black female with braids in casual outfit looking away and browsing smartphone while standing near glass wall
Full length of man standing in snow
Thoughts about the future
Young woman ecologist looking through binoculars at birds on lake against autumn forest birdwatching