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...centre of a zircon crystal, in the form of its chemical characteristics. The zircon will find itself in the now molten rock and will continue to grow outwards, like how tree-rings grow over time. The melt will change its chemical characteristics through time, and therefore so will the zircon crystal, growing continuous concentric ‘zones’ of progressively different...

...centre of a relatively empty room. Four people dressed in blue all-in-one suits, hoods, masks, goggles and gloves are looking at the spacecraft. Special Regions on Mars Category IVc missions are a special case because they are likely to visit Special Regions on Mars. These have been defined as areas where terrestrial organisms carried by a spacecraft might be able to...

...research, as well as giving you an overview of the legal requirements attached to this work. The course discusses issues involved in the handling of chemical and biological agents, basic safety procedures and common field-work hazards...Health, safety and risk assessment are of paramount importance both in the laboratory and the field. This free course, Health and safety...