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...become quite large, with Guinness World Records listing the world’s largest snowflake as 38 cm across, falling in January 1887 at Fort Keogh, Montana, though this is naturally difficult to verify! For aggregation to occur, a cloud must contain many tiny ice crystals, some of which may break up as they fall and produce even smaller crystals, which in turn stick together...

Learning any new skill, like walking and talking, requires children to encode, store and retrieve memories effectively. Lots of practise and sleep helps these skills become automatic and effortless...Please note - there is no sound or speech in this video.

...knowledges, social work engages people and structures to address life challenges and enhance wellbeing...” (IFSW, July 2014). Check out the animation below which summarises the real-life experiences and motivations of Open University social work students and graduates. Plus explore more with our free courses related to social work, which are listed below. Transcript...