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• TLF-IDM008783

This is a colour graphic representation of a water molecule. It depicts the structural formula of water superimposed on a space-filling model and an electron-density isosurface. The diagram is colour-coded to show the dipole nature of the molecule.

• TLF-IDM008777

This is a colour photograph of a leopard seal ('Hydrurga leptonyx') lying on an ice floe. The seal is long and sinuous, and has a small head and a dark grey dorsal surface with a lighter grey underbelly. The seal has recently eaten, and blood from its kill can be seen on the ice.

• TLF-IDM008731

This is a black-and-white illustration captioned 'The first cotton gin'. It shows how the US artist William L Sheppard imagined the scene of the first gin in operation, some 80 years after the actual event. Sheppard depicts two male slaves operating the machine with two white men examining the ginned cotton while female ...

• TLF-IDM008764

This is a colour photograph of a scientist in a laboratory using a laptop computer to download data from electronic animal tags. To the right of the computer is a specialised communication box into which the electronic tag is placed. The scientist in the image is Dr Miles Lamare, a marine biologist involved in sea star ...

• TLF-IDM008766

This is a colour photograph of marine scientist Dr Miles Lamare. Dr Lamare is in his office at the Portobello Marine Laboratory at the University of Otago, New Zealand. On the desk behind Dr Lamare is the scientific equipment he uses to download data from electronic tags, which he attaches to sea stars.

• TLF-IDM008726

This is a black-and-white illustration showing how the well-known American artist Howard Pyle (1853-1911) imagined the landing of the first Africans at Jamestown in the colony of Virginia nearly 300 years after the historical event. Pyle depicts 20 emaciated captives kneeling or sitting on the ground, guarded by men with ...

• TLF-IDM008729

This is a colour lithographic card showing a shackled slave being taken away by his new owner as his wife and child beg to be bought as well so the family would not be separated. The owner gestures them away with his whip. The card was the fourth in a collectable series of 12 album cards entitled 'The slave in 1863. A thrilling ...

• TLF-IDM008794

This is a black-and-white photograph showing the mushroom cloud rising from the explosion of an atomic bomb with an estimated force of 20,000 tonnes of TNT, 560 m above Nagasaki, Japan, on 9 August 1945. Part of the wing of the camera plane that accompanied the bomb-carrying plane can be seen at bottom right. The image ...

• TLF-IDM008772

This image is a diagram known as a trophic pyramid. This example shows the levels of an ecosystem that support the growth of tuna, which might be consumed by a human in a tuna sandwich. The diagram shows six levels in the 'pyramid' from phytoplankton through to humans, and visually depicts the size of the biomass at each ...

• TLF-IDM011207

This resource is about Roman gladiators and their role in Roman society. It covers the origins of the gladiatorial system as a funerary practice to honour the dead, which gradually became entertainment. Topic headings in the resource include: Conscripts and volunteers; Rules and regulations; Fighting-styles; Barrack life; ...