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Sacramento, California, USA - June 8, 2012: A 2001 USA postage stamp with an illustration of Enrice Fermi standing at a chalkboard. Fermi (1901-1954) was a nuclear physicist, and is often referred to as the father of the atomic bomb.
Benjamin Franklin cut on new 100 dollars banknote isolated on white background
A male professor on the university campus, holding documents and looking very frustrated.
A closeup shot of Ulysses S. Grant portrait over the blue surface
Portrait of Commandant General Petrus Jacobus Joubert (1831 - 1900). Vintage photo etching circa late 19th century.
close-up of twenty American dollars, details of 20 American dollars in cash
Vintage image portrait, headshot studio photo of a pensive man looking away
Ivan Aivazovsky a closeup portrait from Armenian money - Dram
Facial Features Pattern Design on Banknote
Grenada postage stamp: Nobel prize
Nikola Tesla (1856 - 1943). Portrait from Serbian banknote. Genius scientist, inventor, electrical engineer, mechanical engineer, and futurist
Cliche of an old scientist. Ironically nostalgic image of the scientist who sits with his microscope in smoke and fumes from his experiments
A closeup of a 50 American dollar banknote
Mihai Eminescu cit from 1000 Romanian lei banknote, 1996 Series - paper, for design purpose
A Males professor on the university campus, holding documents, smiling at the camera in an indoor hallway
Classic wet plate photo of man with beard in vintage 1900 western clothing.
Vintage headshot portrait of a young smiling hispanic man looking at the camera
France Preseren a closeup portrait from Slovenian money - Tolar
Portrait of Reverend William George Lane of the Royal Canadian Regiment of Infantry. Vintage photo etching circa late 19th century.
portrait of the president on American twenty dollar bills, details of paper American cash dollars with a portrait of the president
Formal portrait of a man taken in 1930s.
The portrait of Nikola Tesla from 1000 Yugoslavian dinar banknote isolated on a white background
Antique photograph of people from the World: Mark Twain
A male professor on the university campus, man welcoming and offering handshake, look at the camera with a smile
Double exposure of portrait of U.S. presidents Andrew Jackson and Alexander Hamilton
Fragment of front side of 1000 hryvnias banknote issued in 2019. Volodymyr Vernadsky portrait cut on 1000 UAH banknote isolated on white background
Portrait of an old thoughtful man in the dark. Neo-Pictoralism.
Postage stamp Germany 1993 printed in Germany shows Sir Isaac Newton (1642-1727), scientist, circa 1993
Portrait of Cecil John Rhodes, 7th Prime Minister of the Cape Colony and the founder of De Beers (1853 - 1902). Vintage photo etching circa late 19th century.
Free Images: "bestof:Physicist Thomas Perkins (14465015773).jpg Physicist Thomas Perkins is one of two NIST winners of the 2013 Arthur S Flemming Awards See also http //www nist"
Time & Frequency; Atomic Clocks (5881386915).jpg
Multi-layered Mirror (5881388485).jpg
Ultrafast Photon Detector (5881388183).jpg
Calibrating Infrared Detectors (5881382145).jpg
Polemonium vanbruntiae FWS-1-4x3.jpg
Clintons lily clintonia umbellulata.jpg
Sanguinaria canadensis FWS-1.jpg
Dayflower.jpg
Copper iris.jpg
Dragonfly on plant.jpg
Edwards hairstreak butterfly satyrium edwardsii.jpg
Tiger butterfly insect.jpg
Bunchberry bush.jpg
Nodding trillium plant flower trillium cernuum.jpg
Trillium nivale FWS-1.jpg
Arkansas coneflower erchinacea paradoxa.jpg
Breeches plant dicentra cucullaria.jpg
Erythronium albidum FWS-1.jpg
Gray goldenrod solidago nemoralis.jpg
Green milkweed flower - unknown Asclepias.jpg
Trillium nivale FWS-2.jpg
Erythronium albidum FWS-3.jpg
Yellow and purple monkey flower mimulus rungens.jpg
American columbine flower dark red flower.jpg
Big bend bluebonnet.jpg
Boy fishing holding catched fish.jpg
Bluebell flower.jpg
Bluets flower.jpg
Button blazingstar.jpg
Canada mayflower.jpg
Columbia lily.jpg
Dwarf cinquefoil.jpg
New England aster.jpg
Potato plant flowers.jpg
Shorts aster.jpg
Shorts aster flower.jpg
Fiery skipper insect hylephila phyleus.jpg
Hackberry butterfly insect asterocampa celtis.jpg
Swallowtail butterfly insect.jpg
Katydid on early goldenrod microcentrum retinerve.jpg
Tamias striatus chipmunk animal.jpg
Thalictrum thalictroides FWS-01.jpg
Hairy buttercup.jpg
Cactus bloom in rocks.jpg
Cactus red flowers.jpg
Eagle claw cactus flower bloom.jpg
Opuntia humifusa prickly pear cacti plant.jpg
Glacier lily.jpg
Yellow trout lily flower erythronium americanum.jpg
Arizona lupine.jpg
Lupinus texensis flower.jpg
Silvery lupine floers blooms lupinus argenteus.jpg
Calopogon pulchellus pink orchid plant flower.jpg
Close up of white orchid blossom.jpg
Green fringed orchid close up flower.jpg
Macro photography of yellow orchid blossoms.jpg
Showy orchis orchis spectabilis.jpg
Orange Indian paintbrush flowers castilleja coccinea.jpg
A purple phacelia flower by a water fall.jpg
Nymphaea odorata fragrant water lily flower.jpg
Foam flower tiarella cordifolia.jpg
Great blue lobelia plant flower lobelia siphilitica.jpg
Moccasin flower cypripedium acaule.jpg
Pale jewelweed plant flower impatiens pallida.jpg
Partridgeberry whte flowers mitchella repens.jpg
Purple fringeless orchid flower habenaria peramoena.jpg
Purple plant in bloom hepatica americana.jpg
Rockcastle aster plant flower eurybia saxicastellii.jpg
Royal catchfly plant flower silene regia.jpg
White haired goldenrod flower solidago albopilosa.jpg
A lovely white flower in bloom.jpg
American columbine plant aquilegia canadensis.jpg
Andrews gentian flower.jpg
Aromatic aster.jpg
Beautiful red mountain lover flower pachystima paxistima myrsinites.jpg
Macro photography flowers.jpg
Macro photography pictures plants.jpg
Close up of some yellow flowers with yellowish brown centers.jpg
Sanguinaria canadensis FWS-4.jpg
Sanguinaria canadensis FWS-3.jpg
Sanguinaria canadensis FWS-2.jpg
Button blazingstar flower.jpg
Clasping leaf coneflower.jpg
Colic root flower.jpg
Columbia lily flower.jpg
Compass plant flower.jpg
Creeping phlox flower.jpg
Downy lobelia flower.jpg
Dreamy duskywing skipper.jpg
Dutchmans breeches flower.jpg
Dwarf larkspur flower.jpg
False dragonhead obedient plant physostegia virginiana.jpg
Gattinger lobelia plant flower lobelia appendiculata var gattingeri.jpg
Hairy beardtongue purple and white flowers penstemon hirsutus.jpg
Indian paintbrush red flower.jpg
Jewelweed flower.jpg
Pale jewelweed yellow flower.jpg
Purple coneflower flwer echinacea purpurea asteraceae.jpg
Purple flowers against rocks.jpg
Purple flowers by a rock.jpg
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