Hong Kong Stock Exchange
Hong Kong Stock Exchange (SEHK), Hong Kong, China. In 2004, over 3.8 trillion Hong Kong dollars were traded on the SEHK (nearly 500 billion US dollars) and the hundreds of listed companies had a market value of about 6.6 trillion Hong Kong dollars (846 billion US dollars). Financial trading in Hong Kong dates back to 1866. The present SEHK formed in 1986 from a merger between four different stock exchanges. Thousands of traders use sophisticated telecommunication systems and computer databases to trade financial products on the world markets. The SEHK is one of the world's leading stock exchanges. From 2000, it became a subsidiary of HKEx (Hong Kong Exchanges and Clearing Limited).
© Peter Bowater/Science Photo Library
Sea cucumber (Thelenota sp.) spawning. Microscopic sex cells (gametes) are being released to allow fertilisation (the fusing of a male and a female sex cell). The resulting larvae may grow into adult sea cucumbers. This marine invertebrate is a member of a group of animals (echinoderms) that includes starfish. A sea cucumber lives on the sea floor, crawling on its projecting tube feet, but mostly remaining motionless and gathering its food from the water. It feeds on microscopic sea life (plankton) and also extracts nutrients from the surrounding mud. Sea cucumbers range in length from 2 centimetres to 2 metres. They are found worldwide. Photographed in the Red Sea.
© PETER SCOONES/SCIENCE PHOTO LIBRARY
Cuba. True-colour satellite image of the island of Cuba (upper left to lower right) in the Caribbean Sea. North is at top. Vegetation is green, water is blue and clouds are white. The Bahamian island of Andros (upper right) is surrounded by the shallow seas (light blue) of the Great Bahama Bank. South of the eastern half of Cuba is the island of Jamaica (lower right). Another bank is seen off the western end of Cuba, by the Isla de la Juventud (centre left). Data collected on 15 November 2001 by the Moderate Resolution Imaging Spectroradiometer (MODIS) aboard NASA's Terra satellite.
© NASA/SCIENCE PHOTO LIBRARY