Scale Bar Collection

Cell types, artwork
Cell types. Cutaway artwork with a scale bar (upper right, in micrometres) showing the relative sizes of eukaryotic cells (those containing a nucleus) and prokaryotic cells (those lacking a nucleus)

Homo erectus skull. Artwork, from 1931, showing a reconstruction of the skull of Java Man, based on the fossil skull fragments (dark grey) discovered by Dubois in Java in 1891

Orteliuss map of Europe, 1603
Orteliuss map of Europe. This map of Europe is from the 1603 edition of Theatrum orbis terrarum (Theatre of the World). First published in 1570 by Flemish mapmaker Abraham Ortelius (1527-1598)

Kilogram 18, UK copy of SI unit of mass C016 / 2049
Kilogram 18, UK copy of SI unit of mass. The UKs National Standard Kilogram, copy number 18 of the International Prototype, was allocated in 1889 when the standard was established

Rose plant fossils, leaves and thorn C016 / 5418
Rose plant fossils. At left are fossilised leaves of the rose plant Rosa hilliiae (Lesquereux), from the Oligocene period (23 to 35 million years ago), and found in Colorado, USA

Titan and Hercules beetles C016 / 5327
Titan and Hercules beetles. The Titan beetle (Titanus giganteus, left, 160 millimetres in length) and the Hercules beetle (Dynastes hercules, right)

Sumatran rabbit, skin specimen C016 / 5163
Sumatran rabbit (Nesolagus netscheri), skin specimen. This specimen is part of the collections of the Natural History Museum, London, UK

Dicroidium, seed fern fossil C016 / 5054
Dicroidium, seed fern fossil. This specimen, from Queensland, Australia, dates from the Triassic. It is part of the collections held at the Natural History Museum, London, UK

Credneria triacuminata, leaf fossil C016 / 4948
Credneria triacuminata, leaf fossil. Large leaves are indicative of humid tropical climates. This specimen is approximately 17 centimetres across

Myelodactylus fletcheri, crinoid fossil C016 / 4917
Myelodactylus fletcheri, crinoid fossil. Crinoids are marine organisms, most of which have long stalks anchored to the seabed, with five or more feathery arms radiating from a central disc

Protaxocrinus, crinoid fossil C016 / 4918
Protaxocrinus tuberculatus, crinoid fossil. Crinoids are marine organisms, most of which have long stalks anchored to the seabed, with five or more feathery arms radiating from a central disc

Petrified tree fern, tree trunk fossil C016 / 4914
Petrified tree fern. Polished section of a fossil of the trunk of the tree fern Psaronius. This specimen is approximately 15 centimetres across

Petrified oak, tree trunk fossil C016 / 4913
Petrified oak. Polished section of a fossil of the trunk of an oak tree (Quercus sp.). This specimen is approximately 33 centimetres across

Thursophyton elberfeldense, plant fossils C016 / 4911
Thursophyton elberfeldense, plant fossils. This fine-grained shale block contains fossils of massed stick-like stems of early land plants. It is approximately 27 centimetres across

Petrified conifer, tree trunk fossil C016 / 4912
Petrified conifer. Polished section of a fossil of the trunk of the conifer Araucarioxylon arizxonicum. This is the dominant conifer of Petrified Forest National Park, Arizona, USA

Lepidodendron, tree trunk fossil C016 / 4910
Lepidodendron, tree trunk fossil. This specimen is about 6cm in diameter. It is part of the collections held at the Natural History Museum, London, UK

Archaeopteris hibernica, tree fossil C016 / 4876
Archaeopteris hibernica, fossilised tree branch. The lower section of the branch bears looses cones. This early tree from the Upper Devonian was first thought to have been a fern frond

Protobarinophyton, plant fossil C016 / 4874
Protobarinophyton obrutschevii, plant fossil. These fossilised leafless stems are topped by a cone-like array of spore sacs around 3 millimetres across

Specimens of oldest rocks on Earth C016 / 4849
Specimens of oldest rocks on Earth. Selection of specimens of the oldest known rocks found on Earth. At centre (one specimen halved) are volcanic ash pebbles from Greenland

Australopithecus and gorilla brains. Historical artwork comparing the brain sizes of an early hominid (Australopithecus, from 4-2 million years ago) and a gorilla (brains seen from behind)

Taung Child skull. Artwork, from 1931, showing the appearance and size (scale in millimetres) of the fossil skull discovered by Dart in Taung, South Africa, in 1924

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"Exploring the Scale Bar: A Journey through Time and Life" Step into a world where the scale bar unveils the secrets of cell types and artwork, Homo erectus skulls and ancient maps. Let us embark on an extraordinary adventure. Delve into history as we examine Orteliuss map of Europe from 1603, marveling at its intricate details that once guided explorers across unknown lands. The scale bar allows us to appreciate the craftsmanship behind this cartographic masterpiece. Moving forward in time, let's explore the kilogram 18, a UK copy of the SI unit of mass. This artifact represents humanity's pursuit for precision in measurement—a testament to our scientific progress. Nature's wonders come alive with rose plant fossils showcasing delicate leaves and thorns frozen in time. These remnants tell stories of beauty and resilience that have endured for centuries. Behold the magnificent Titan and Hercules beetles. With their vibrant colors and impressive size, these creatures remind us of nature's incredible diversity—captured by scientists using precise measurements provided by the scale bar. Venturing further, we encounter a rare specimen—the Sumatran rabbit skin—an invaluable resource for studying biodiversity. Its presence reminds us to cherish Earth's rich tapestry of life forms. Travel back millions of years as we uncover ancient plant fossils like Dicroidium—a seed fern fossil—and Credneria triacuminata—a leaf fossil. These relics offer glimpses into prehistoric ecosystems that thrived long before our existence. The it also reveals marine treasures such as Myelodactylus fletcheri—an exquisite crinoid fossil—and Protaxocrinus—a captivating relic from deep ocean depths. These specimens allow us to connect with distant eras when these creatures ruled beneath turbulent waves. Finally, witness nature's artistry preserved within petrified tree ferns—tree trunk fossils that stand as silent witnesses to Earth's ever-changing landscape throughout the ages.