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Testosterone
SS22575743
RM
Spencer Sutton / Science Source
Testosterone
Serotonin
SS22575729
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Science Source
Serotonin
Estrogen
SS22575715
RM
Science Source
Estrogen
Testosterone
SS22575701
RM
Science Source
Testosterone
Serotonin
SS22575687
RM
Science Source
Serotonin
Glucagon
SS22575673
RM
Science Source
Glucagon
Morphine
SS22575659
RM
Science Source
Morphine
Estrogen
SS22575645
RM
Science Source
Estrogen
Morphine
SS22575631
RM
Science Source
Morphine
Dopamine
SS22575617
RM
Science Source
Dopamine
Oxycodone
SS22575591
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Science Source
Oxycodone
Aspirin
SS22575577
RM
Science Source
Aspirin
Cocaine
SS22575563
RM
Science Source
Cocaine
Dopamine
SS22575549
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Spencer Sutton / Science Source
Dopamine
Oxycodone
SS22575523
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Science Source
Oxycodone
Cocaine
SS22575495
RM
Science Source
Cocaine
Aspirin
SS22575496
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Science Source
Aspirin
Nematode, LM
SS2874985
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Marek Mis / Science Source
Nematode, LM
Nematode, LM
SS2874983
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Marek Mis / Science Source
Nematode, LM
Nematode, LM
SS2874982
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Marek Mis / Science Source
Nematode, LM
Damselfly caudal gill anatomy, LM
SS2874965
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Marek Mis / Science Source
Damselfly caudal gill anatomy, LM
Damselfly caudal gill anatomy, LM
SS2874963
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Marek Mis / Science Source
Damselfly caudal gill anatomy, LM
Xanthidium antilopaeum (desmids)
SS2874951
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Marek Mis / Science Source
Xanthidium antilopaeum (desmids)
Xanthidium antilopaeum (desmids)
SS2874950
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Marek Mis / Science Source
Xanthidium antilopaeum (desmids)
Xanthidium antilopaeum (desmid), LM
SS2874943
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Marek Mis / Science Source
Xanthidium antilopaeum (desmid), LM
Micrasterias truncata (desmid) near Sphagnum leaf (moss)
SS2874931
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Marek Mis / Science Source
Micrasterias truncata (desmid) near Sphagnum leaf (moss)
Gray Abstract Swirls
SS22497845
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David Chapman / Design Pics / Science Source
Gray Abstract Swirls
Vegetation in Lake Murray, Oklahoma.
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Jennifer Idol/Stocktrek Images / Science Source
Vegetation in Lake Murray, Oklahoma.
Thousands of glass fish hover over a tube sponge, Raja Ampat, Indonesia.
SS2899630
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Brook Peterson/Stocktrek Images / Science Source
Thousands of glass fish hover over a tube sponge, Raja Ampat, Indonesia.
Grains of sand.
SS2874794
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Marek Mis / Science Source
Grains of sand.
Grains of sand.
SS2874790
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Marek Mis / Science Source
Grains of sand.
Picea abies (norway spruce) small branch transversal cross-section.
SS2874780
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Marek Mis / Science Source
Picea abies (norway spruce) small branch transversal cross-section.
Picea omorica (bosnian spruce) needle transversal cross-section.
SS2874779
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Marek Mis / Science Source
Picea omorica (bosnian spruce) needle transversal cross-section.
Asparagus (sparrow grass) stalk transversal cross-section.
SS2874775
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Marek Mis / Science Source
Asparagus (sparrow grass) stalk transversal cross-section.
Picea omorica (bosnian spruce) needle longitudinal cross-section.
SS2874774
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Marek Mis / Science Source
Picea omorica (bosnian spruce) needle longitudinal cross-section.
Asparagus (sparrow grass) stalk transversal cross-section.
SS2874773
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Marek Mis / Science Source
Asparagus (sparrow grass) stalk transversal cross-section.
Larches (Larix sp.) stalk transversal cross-section.
SS2874769
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Marek Mis / Science Source
Larches (Larix sp.) stalk transversal cross-section.
Picea omorica (bosnian spruce) needle transversal cross-section.
SS2874770
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Marek Mis / Science Source
Picea omorica (bosnian spruce) needle transversal cross-section.
Larches (Larix sp.) stalk transversal cross-section.
SS2874768
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Marek Mis / Science Source
Larches (Larix sp.) stalk transversal cross-section.
Pine (Pinus sp.) needle transversal cross-section.
SS2874766
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Marek Mis / Science Source
Pine (Pinus sp.) needle transversal cross-section.
Pine (Pinus sp.) needle longitudinal cross-section.
SS2874762
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Marek Mis / Science Source
Pine (Pinus sp.) needle longitudinal cross-section.
Hepatica sp. (Liverleaf)
SS2874761
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Marek Mis / Science Source
Hepatica sp. (Liverleaf)
Fern vascular bundle
SS2874745
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Marek Mis / Science Source
Fern vascular bundle
Fern vascular bundle
SS2874744
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Marek Mis / Science Source
Fern vascular bundle
Fern vascular bundles
SS2874742
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Marek Mis / Science Source
Fern vascular bundles
Fern vascular bundles
SS2874740
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Marek Mis / Science Source
Fern vascular bundles
Fern vascular bundle
SS2874739
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Marek Mis / Science Source
Fern vascular bundle
Fern vascular bundle
SS2874738
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Marek Mis / Science Source
Fern vascular bundle
Fern vascular bundle
SS2874736
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Marek Mis / Science Source
Fern vascular bundle
Fern vascular bundles
SS2874734
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Marek Mis / Science Source
Fern vascular bundles
Fern vascular bundles
SS2874731
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Marek Mis / Science Source
Fern vascular bundles
Fern vascular bundles
SS2874733
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Marek Mis / Science Source
Fern vascular bundles
Fern vascular bundle
SS2874730
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Marek Mis / Science Source
Fern vascular bundle
Moss capsule transversal cross-section
SS2874727
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Marek Mis / Science Source
Moss capsule transversal cross-section
Moss capsule longitudinal cross-section
SS2874723
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Marek Mis / Science Source
Moss capsule longitudinal cross-section
Moss capsule transversal cross-section
SS2874720
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Marek Mis / Science Source
Moss capsule transversal cross-section
Moss spores
SS2874718
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Marek Mis / Science Source
Moss spores
Lilium stomata in the leaf epidermis
SS2874717
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Marek Mis / Science Source
Lilium stomata in the leaf epidermis
Moss capsule transversal cross-section
SS2874716
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Marek Mis / Science Source
Moss capsule transversal cross-section
Lilium stomata in the leaf epidermis
SS2874714
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Marek Mis / Science Source
Lilium stomata in the leaf epidermis
Lilium stomata in the leaf epidermis
SS2874712
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Marek Mis / Science Source
Lilium stomata in the leaf epidermis
Lily of the valley (Convallaria majalis)
SS2874710
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Marek Mis / Science Source
Lily of the valley (Convallaria majalis)
Solomon's seal (Polygonatum multiflorum)
SS2874687
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Marek Mis / Science Source
Solomon's seal (Polygonatum multiflorum)
Solomon's seal (Polygonatum multiflorum)
SS2874690
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Marek Mis / Science Source
Solomon's seal (Polygonatum multiflorum)
Melanocytes in frog tadpole tail
SS2874685
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Marek Mis / Science Source
Melanocytes in frog tadpole tail
Scilla (squill) stomata
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Marek Mis / Science Source
Scilla (squill) stomata
Full Moon
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Yuichi Takasaka/Stocktrek Images / Science Source
Full Moon
Dark symmetrical abstract pattern
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Matt Lyon / Science Source
Dark symmetrical abstract pattern
Chaotic abstract pattern
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Matt Lyon / Science Source
Chaotic abstract pattern
Snowy Hill
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Craig Tuttle / Design Pics / Science Source
Snowy Hill
Winter Frost On Leaves
SS22498810
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Craig Tuttle / Design Pics / Science Source
Winter Frost On Leaves
Marine Iguana On Rock
SS22498787
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Robert Brown / Design Pics / Science Source
Marine Iguana On Rock
Spider On Web
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Craig Tuttle / Design Pics / Science Source
Spider On Web
Icicles On Tree
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Craig Tuttle / Design Pics / Science Source
Icicles On Tree
Ice On Creek
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Craig Tuttle / Design Pics / Science Source
Ice On Creek
Pile Of Matches
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David Chapman / Design Pics / Science Source
Pile Of Matches
Blue Bottles
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David Chapman / Design Pics / Science Source
Blue Bottles
Bison
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Richard Wear / Design Pics / Science Source
Bison
Red Bottles
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David Chapman / Design Pics / Science Source
Red Bottles
Rusty Metal
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David Chapman / Design Pics / Science Source
Rusty Metal
Tree Stump
SS22497858
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Chris and Kate Knorr / Design Pics / Science Source
Tree Stump
Abstract blue striped pattern
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Ben Miners / Science Source
Abstract blue striped pattern
Lock On A Door
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The Irish Image Collection / Design Pics / Science Source
Lock On A Door
Pencil Shavings
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The Irish Image Collection / Design Pics / Science Source
Pencil Shavings
A Toilet
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Darren Greenwood / Design Pics / Science Source
A Toilet
Gears
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Don Hammond / Design Pics / Science Source
Gears
Blindfolded man
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Skopein / Science Source
Blindfolded man
A large common lionfish  swimming at Beqa Lagoon, Fiji.
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Terry Moore/Stocktrek Images / Science Source
A large common lionfish swimming at Beqa Lagoon, Fiji.
Rope sponges on a deep reef off the cosat of Bonaire.
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Terry Moore/Stocktrek Images / Science Source
Rope sponges on a deep reef off the cosat of Bonaire.
Feather Duster Worms, Bonaire, Caribbean Netherlands.
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Terry Moore/Stocktrek Images / Science Source
Feather Duster Worms, Bonaire, Caribbean Netherlands.
NGC 4388, spiral galaxy in the Virgo Cluster.
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Michael Miller/Stocktrek Images / Science Source
NGC 4388, spiral galaxy in the Virgo Cluster.
NGC 4437 galaxy.
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Michael Miller/Stocktrek Images / Science Source
NGC 4437 galaxy.
A Pachyrhinosaurus, an Albertaceratops and a Styracosaurus dinosaur.
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Mark Stevenson/Stocktrek Images / Science Source
A Pachyrhinosaurus, an Albertaceratops and a Styracosaurus dinosaur.
Olorotitan, Corythosaurus and Parasaurolphus
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Mark Stevenson/Stocktrek Images / Science Source
Olorotitan, Corythosaurus and Parasaurolphus
Vegetation growing in Loch Low-Minn in Tennessee.
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Jennifer Idol/Stocktrek Images / Science Source
Vegetation growing in Loch Low-Minn in Tennessee.
Light filters through Jug Hole, Ichetucknee Springs State Park in Florida.
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Jennifer Idol/Stocktrek Images / Science Source
Light filters through Jug Hole, Ichetucknee Springs State Park in Florida.
Bubble rings in the clear waters of Dutch Springs, Pennsylvania.
SS2902188
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Jennifer Idol/Stocktrek Images / Science Source
Bubble rings in the clear waters of Dutch Springs, Pennsylvania.
Shoreline of Lake McDonald, Glacier National Park, Montana.
SS2902186
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Jennifer Idol/Stocktrek Images / Science Source
Shoreline of Lake McDonald, Glacier National Park, Montana.
Vegetation sways in the flow of the springs of San Marcos, Texas.
SS2902175
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Jennifer Idol/Stocktrek Images / Science Source
Vegetation sways in the flow of the springs of San Marcos, Texas.
Boulders in Lake Tahoe, Nevada.
SS2902152
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Jennifer Idol/Stocktrek Images / Science Source
Boulders in Lake Tahoe, Nevada.
Boulders in Lake Tahoe, Nevada.
SS2902151
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Jennifer Idol/Stocktrek Images / Science Source
Boulders in Lake Tahoe, Nevada.
Boulders in Lake Tahoe, Nevada.
SS2902150
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Jennifer Idol/Stocktrek Images / Science Source
Boulders in Lake Tahoe, Nevada.
Boulders in Lake Tahoe, Nevada.
SS2902148
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Jennifer Idol/Stocktrek Images / Science Source
Boulders in Lake Tahoe, Nevada.
Volcanic activity created Clear Lake, Oregon, 3,000 years ago.
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Jennifer Idol/Stocktrek Images / Science Source
Volcanic activity created Clear Lake, Oregon, 3,000 years ago.
A hairy frogfish dangles its lure above its mouth hoping to catch a passing fish.
SS2899714
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Brook Peterson/Stocktrek Images / Science Source
A hairy frogfish dangles its lure above its mouth hoping to catch a passing fish.
Reefscape in the Banda Sea, Indonesia.
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Aaron Wong/Stocktrek Images / Science Source
Reefscape in the Banda Sea, Indonesia.
Bubbles rising from the deep against the blue in Komodo, Indonesia.
SS2896151
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Aaron Wong/Stocktrek Images / Science Source
Bubbles rising from the deep against the blue in Komodo, Indonesia.
Bubbles rising from the deep against the blue in Komodo, Indonesia.
SS2896145
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Aaron Wong/Stocktrek Images / Science Source
Bubbles rising from the deep against the blue in Komodo, Indonesia.
Rushing bubbles by the side of speeding boat.
SS2896143
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Aaron Wong/Stocktrek Images / Science Source
Rushing bubbles by the side of speeding boat.
Solomon's seal (Polygonatum multiflorum) stoma
SS2874694
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Marek Mis / Science Source
Solomon's seal (Polygonatum multiflorum) stoma
Tamworth pig
SS2862827
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Andrew Hutchinson / Science Source
Tamworth pig
Old, gnarled oak tree
SS2862814
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Andrew Hutchinson / Science Source
Old, gnarled oak tree
Abstract full frame backgrounds pattern
SS2861890
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Vicky Vougiouka / Science Source
Abstract full frame backgrounds pattern
Abstract curled up paper backgrounds pattern
SS2861515
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Gary Waters / Science Source
Abstract curled up paper backgrounds pattern
Abstract pattern
SS2859777
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Paul Price / Science Source
Abstract pattern
Abstract technology design
SS2859773
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Paul Price / Science Source
Abstract technology design
Moon and Venus Conjunction
SS2760872
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Yuichi Takasaka/Stocktrek Images / Science Source
Moon and Venus Conjunction
Venus and Moon Conjunction
SS2760871
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Yuichi Takasaka/Stocktrek Images / Science Source
Venus and Moon Conjunction
Noctilucent Coluds
SS2760837
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Yuichi Takasaka/Stocktrek Images / Science Source
Noctilucent Coluds
Noctilucent Coluds
SS2760832
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Yuichi Takasaka/Stocktrek Images / Science Source
Noctilucent Coluds
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