Movement of biological hotpots Biological hotspots are areas of high biodiversity. There are more species than in surrounding areas. For coral reefs, Indonesia is a hotspot. The region extends to Papua New Guinea and northern Australia. Over time hotspots move. It´s thought hotspots develop where tectonic plates collide, slamming into each other. They produce island arcs, volcanism and new habitats. Today, coral reef hotspots are being denuded by human activity. WA biological hotspot reveals new species Over 1,500 flowering plants in Western Australia are undescribed, with 870 of these occurring in the south-western Australian biodiversity hotspot. State-wide, 298 new plants were named in 2007, making it the second most productive year in Western Australian taxonomic history. Of these, at least 130 are from the south-western Australian biodiversity hotspot. Ninety-five new botanical names were published in a special edition of the Western Australian Herbarium´s journal Nuytsia, which provides descriptions and names to species vulnerable to mining or of conservation concern. Iconic banksia rescued Researchers in Western Australia have increased the genetic diversity of a critically endangered banksia. Using material from extinct populations in research in Britain, scientists have brought back seedlings for planting in WA thereby increasing the genetic diversity of plants in the wild. Mobility for disabled people Darren Lomman has developed apparatus which allows disabled people to ride motorbikes, motor cycles and drive power boats. The heart hormone angiotensin The hormone angiotensin allows the heart to grow normally. Cells of the heart become bigger. The hormone also controls blood pressure. But in the disease state, it causes growth which may lead to heart failure. Work is being done to develop drugs which let angiotensin to its good work, but blocking the bad. Volunteers describe galaxies at Galaxy Zoo Volunteers have been called upon to help categorise images of a million galaxies using their home computers. The work is part of the Sloan Digital Sky Survey. Over 140,000 people are working on the project, named Galaxy Zoo. Some amazing objects in space are being discovered and the results have lead astronomers to describe a whole new category of galaxies. Naomi Fowler reports. Saturn´s moon Titan Saturn has over 60 moons. One stands out and that´s Titan. But it came from somewhere else and is unrelated to other satellites around the planet. Titan is much bigger than the other moons of Saturn and could even be considered a planet. It is even bigger than the planet Mercury! Andrew Prentice discusses Titan´s history and how it affects other satellites around Saturn.