John Cancalosi / Cross-Section of Utah Septarian Nodule, Utah. A type of geode, Utah Septarian Nodules are found about 15 miles east of Zion National park. They were formed in an ancient sea floor during the Cretaceou...

Jouan Rius / Petrified wood segment, Blue Mesa Badlands, Petrified Forest National Park, Arizona, USA, December 2012.

Nigel Cattlin / Daisy (Bellis perennis) cross section, composite flower with white ray florets and yellow disk florets.

Nigel Cattlin / Dandelion (Taraxacum officinale), cross section of composite flower with disk and ray florets, on black background.

Nigel Cattlin / Spanish bluebell (Hyacinthoides hispanica) cross section of bulb with leaf and root development. Cultivated in garden. January.

Nigel Cattlin / Banana (Musa x paradisiaca) cross section showing tightly packed leaves is pseudostem.

Nigel Cattlin / Tulip (Tulipa sp) flower cross section with mature anthers and style, close up. Berkshire, England, UK. April.

Nigel Cattlin / Tulip (Tulipa sp) flower cross section with immature anthers and style, close up. Berkshire, England, UK. April.

Nigel Cattlin / Tulip (Tulipa sp) flower with red petals, cross section showing mature anthers and style. Berkshire, England, UK. April.

Nigel Cattlin / Tulip (Tulipa sp) flower with orange petals, cross section showing mature anthers and style. Berkshire, England, UK. April.

Nigel Cattlin / Broad bean (Vicia faba) young plant with early leaves and roots, uprooted and germinated seed split to show food reserve.

Nigel Cattlin / Broad bean (Vicia faba), close up of roots and cross section of germinated seed to show food reserve.

Nigel Cattlin / White pasqueflower (Pulsatilla vulgaris 'Alba') cross section, close up of stamens and stigma, cultivated in garden. Berkshire, England, UK. April.

Nigel Cattlin / Daffodil (Narcissus cyclamineus 'Jetfire') cross section of flower trumpet with stamens, style and ovules inside ovary. March.

Nigel Cattlin / Daffodil (Narcissus cyclamineus 'Jetfire') cross section of flower trumpet with stamens, style and ovules inside ovary. March.

Nigel Cattlin / Doyenne du Comice pear (Pyrus communis) fruit with deformity and internal hard growth caused by Pear stony pit virus, cross section. Berkshire, England, UK. October.

Nigel Cattlin / Doyenne du Comice pear (Pyrus communis) fruit with deformity and internal hard growth caused by Pear stony pit virus, cross section. Berkshire, England, UK. October.

Nigel Cattlin / Jackfruit (Artocarpus heterophyllus), sections pf young fruit for sale at wet food market, Bangkok, Thailand.

Adrian Davies / Pitcher plant (Sarracenia minor) cross section of mature plant, insect prey inside.

Adrian Davies / Pitcher plant (Sarracenia minor) cross section of mature plant, insect prey inside.

Heather Angel / Peach leaved bellflower (Campanula persicifolia) dissection, petals removed to show how stamens transfer pollen to style via secondary pollen presentation in bud stage. Focus stacked.

Heather Angel / Himalayan balsam (Impatiens glandulifera), dissection of flowers. Male phase above, downward projecting stamens release pollen onto backs of bumblebees and honey bees. Female phase below with downward...

Ingo Arndt / Median wasp (Dolichovespula media) nest, cross section showing combs. Hessen, Germany.

Juan Carlos Munoz / Scots pine (Pinus sylvestris), certified timber. Laguna Negra y Circos Glaciares de Urbion natural park, Soria province, Castilla y Leon, Spain. November, 2017.

Ingo Arndt / Median wasp (Dolichovespula media) cross section of nest showing combs, Hessen, Germany, April.

John Cancalosi / Hertfordshire Puddingstone, a conglomerate of well rounded flint pebbles, embedded in a matrix of fine pale coloured sand, all bound together by hard natural silica cement, Hertfordshire, england

Niall Benvie / Pomegranate (Punica granatum) cross section, backlit.

Niall Benvie / Kiwi fruit (Actinidia sp) cross section backlit.

Niall Benvie / Water melon (Citrullus lanatus var. lanatus) cross section backlit.

John Cancalosi / Metaconglomerate, a metamorphosed conglomerate, the green is epidote, "green marinace" in the stone trade, polished cross-section, Brazil.

John Cancalosi / Close up of a polished cross section of Kambaba Jasper, fossil Stromatolite, Madagascar.

John Cancalosi / Close up of a polished cross section of Kambaba Jasper, fossilised Stromatolite, Madagascar.

John Cancalosi / Close up of a polished cross section of Breccia, sedimentary rock with angled clasts showing lack limited transportation before deposition, Arizona, USA.

John Cancalosi / Cross section of a Septarian nodule, Morrocco.

John Cancalosi / Mookaite, a brecciated radiolarite, composed of fossil radiolarians, Western Australia, Cretaceous period.

John Cancalosi / Brazilian agate slice.

Alex Hyde / Common Earthball (Scleroderma citrinum) including opened specimen revealing black spores. Growing in deciduous woodland. Derbyshire, UK. September.

Chris Mattison / Ammonite, cross section.

Chris Mattison / Ammonite, cross section on black background,

Pal Hermansen / Red cabbage (Brassica oleracea var. capitata f. rubra) cross section showing leaf spiral.

Adrian Davies / Inkstain Bolete (Boletus pulverulentus) cross section showing characteristic staining, Surrey, England, UK, August.

Adrian Davies / Primrose (Primula vulgaris) pin eyed specimen with protruding stigma, as opposed to protruding stamens (known as thrum eyed)

Eric Baccega / Common hamster (Cricetus cricetus) in its burrow, Alsace, France, April, captive

Roland Seitre / Dipterocarpus (Dipteryx panamensis) nuts, showing carpum and seed; an important food of the Great Green / Buffon's Macaw. Boca Tapada, Biological Corridor San Juan La Selva, Costa Rica. 2008.

Roland Seitre / Cross-section of European Hornet (Vespa crabro) nests, showing cells with larvae at different stages of metamorphosis from pupa to adult. Tours, France, August.

Roland Seitre / Cross-section of European Hornet (Vespa crabro) larvae in cells, showing different stages of development. Tours, France, August.

Klaus Echle / Developing and mature Douglas Fir (Pseudotsuga menziesii) cones, a young one split in two to show internal structure. Black Forest, Germany, August.

Martin Camm / Carwardine / Illustration of Sperm Whale (Physeter macrocephalus), cross-section of head showing spermaceti organ (purple) and spermaceti (pink) (Wildlife Art Company).

Will Watson / Cross section of 4500 year old Bog oak (Quercus sp.) extracted from fen at Holme Fen National Nature Reserve, Cambridgeshire, UK, February.

Will Watson / Felled trunk of Ash (Fraxinus excelsior) tree showing signs of Ash dieback disease (Hymenoscyphus pseudofraxineus), ancient woodland, Herefordshire Plateau, England, UK, April.

Adrian Davies / Cross section of fruit in visible light, and fluorescing in UV light on black background. Top: Orange; Centre: Kiwi; Bottom: Pomegranate.

Solvin Zankl / Nest of Poppy bee (Osmia papaveris) lined with pieces of petals from Common poppy (Papaver rhoeas), filled with pollen and nectar, containing single egg. Bamberg, Germany. June.

Doug Wechsler / Acorn weevil (Curculio sp.) larva inside White oak (Quercus alba) acorn, cross-section, Pennsylvania, USA. September.

Doug Wechsler / Group of Small carpenter bees (Ceratina sp.) sheltering inside Goldenrod (Solidago sp.) stalk (cross section), Pennsylvania, USA. September.

Nick Upton / Cross section of insect hotel showing Wood-carving leafcutter bee (Megachile ligniseca) nest cells, cocoons wrapped in leaves, Wiltshire, UK. October.

Nick Upton / Cross section of insect hotel showing Wood-carving leafcutter bee (Megachile ligniseca) nest cells, cocoons wrapped in leaves, Wiltshire, UK. October.

Nick Upton / Cross section of insect hotel showing Wood-carving leafcutter bee (Megachile ligniseca) nest cells, cocoons wrapped in leaves, Wiltshire, UK. October.

Nigel Cattlin / White willd teasel (Dipsacus fullonum) cross section through flower head. July.

Nigel Cattlin / Woolly thistle (Cirsium eriophorum) cross section through flowerhead with purple disc florets, round head, developing achenes, receptacle and pappus.

David Maitland / Autofluorescence image of a cross section through the tip of the growing leaf-whorl of Pampas grass (Cortaderia selloana) exposed to UV light, the chlorophyll fluoresces red and the lignin blue. The &...

Adrian Davies / Dodder (Cuscuta sp.) transverse section through stem of host plant showing haustoria of the parasite.

Adrian Davies / Mistletoe (Viscum album) attached to host plant, cross section.

Adrian Davies / Mistletoe (Viscum album), a hemiparasite, haustoria entering host plant, shown under UV fluorescence.

Nigel Cattlin / Strawberry red core / Red stele (Phytophthora fragariae) showing red colour of diseased root in section.

Nigel Cattlin / Dandelion (Taraxacum officinale) seed head with some seeds removed to show structure with seeds and pappus.

Nigel Cattlin / Wheat (Triticum aestivum) plant growth stage 21 with no sub-crown internode, shallow cultivation regime.

Nigel Cattlin / Stem rot (Sclerotinia sclerotiorum) sclerotia shown in a sectioned stem of Chilli pepper (Capsicum annuum), Thailand, South East Asia.

Nigel Cattlin / Wheat (Triticum aestivum) plant growth stage 21 with long sub-crown internode with deep planted seed.

Nigel Cattlin / Cross section of a potato (Solanum tuberosum) tuber showing spraing, a symptom of Tobacco rattle virus (TRV) and Potato mop-top virus (PMTV).

Juergen Freund / Working round the clock, scientists / researchers scrape out tiny corals growing on preprepared settlement substrate / tiles ready for experiment plots. Settlement substrate provides baby corals with...

Juergen Freund / Nadine Boulotte, Southern Cross university PhD researcher and Katie Chartrand, Senior researcher at James Cook University examining tiny coral larvae under a microscope. Part of Coral IVF' team workin...

Juergen Freund / Professor Peter Harrison drilling a hole onto damaged reefs in the experiment plot to bolt in the tiles where the coral larvae will settle. Looking on is Dr. Simon Hartley Southern Cross University.Pa...

Juergen Freund / Professor Peter Harrison from Southern Cross University sitting on edge of nursery pool filled with coral larvae. Part of Coral IVF project to rear coral and replenish degraded sections of Great Barri...

Juergen Freund / Scientists and researchers from the Coral IVF project led by Southern Cross University. Katie Chartrand (James Cook University) pours 5 day old coral larvae into a sieve held by Prof. Peter Harrison (...

Juergen Freund / Scientists Nadine Boulotte from Southern Cross University(left) and Katie Chartrand from James Cook University (right) looking down microscopes at Coral larvae. Part of Coral IVF project to rear coral...

Juergen Freund / Scientists Dr. Dexter de la Cruz and Prof. Peter Harrison from Southern Cross University looking down microscopes at Coral larvae. Part of Coral IVF project to rear coral and replenish degraded sectio...

Juergen Freund / Bio-optical sensor to measure health and productivity of organisms that photosynthesise in Coral and Algae. Used by scientists from Coral IVF team working to replenish degraded sections of Great Barri...

Juergen Freund / Biologist Katie Chartrand of James Cook University aerating and de-clumping Coral larvae in larval pool. The Coral IVF project led by Southern Cross University captures Coral sperm and eggs before rea...

Juergen Freund / Scientists from Coral IVF team setting up larval distribution plots. Project to rear Coral and replenish degraded sections of Great Barrier Reef, led by Prof. Peter Harrison of Southern Cross Universi...

Juergen Freund / Coral reef with fish and diver from Coral IVF, Coral Larval Restoration Project in background. Project led by Southern Cross University to rear Coral and replenish degraded sections of Great Barrier R...

Juergen Freund / Staghorn coral (Acropora sp) in cross section, gravid coral with pink egg bundles. Queensland, Australia. December.

Nigel Cattlin / Barley (Hordeum vulgare) grain, cross sections of seeds treated with tetrazolium salt which stains viable living tissue red, a test for germination.

Adrian Davies / Banana (Musa sp) cut section through stem. Costa Rica