Bryan and Cherry Alexander / Melting iceberg showing the portion underwater that is sculpted by the sea. Polar regions. Digitally created image composite

Bryan and Cherry Alexander / Tabular iceberg showing the portion underwater that is sculpted by the sea. Polar regions. Digitally created image composite

Bryan and Cherry Alexander / Ice arch iceberg showing the portion underwater that is sculpted by the sea. Polar regions. Digitally created image composite

Juergen Freund / Researchers Guido and Katja Westhoff work in a mobile lab in the bush. To handle the deadly Common death adder (Acanthophis antarcticus) Guido puts the head and upper portion of the snake in a plastic...

Doug Gimesy / Platypus (Ornithorhynchus anatinus) male, close up of mid portion of tail, taxidermied animal. Belgrave, Victoria, Australia.

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

Tony Wu / Whale curry for sale, each box with a 200g curry portion for 540 Yen. Kochi Prefecture, Shikoku, Japan. June 2017.

Tony Wu / Humpback whale (Megaptera novaeangliae) male blowing bubbles, likely a display of dominance during heat run. The male had a small portion of his penis protruding. Vava'u, Tonga. Pacific Ocean.

Charlie Summers / Transit of Mercury in front of the sun as seen from Denver, Colorado at 07:09 on 9 May 2016 Mercury is the dot in the lower portion of the sun, all other dots are sun spots.

David Shale / Siphonophore (Nanomia) portion of siphosome with at least 15 cormidia, Gulf of Maine, Atlantic Ocean. Epipelagic species found up to 300m depth.

Tony Wu / Hardyhead silversides (Atherinomorus lacunosus) swarming around the coral-encrusted remains of a portion of the jetty at Samarai Island in Milne Bay, Papua New Guinea

Tony Wu / Fin whale (Balaenoptera physalus) large vertebrate of the middle portion of exhumed carcass, Tokyo, Japan, November 2013