Science for seven- to nine-year-olds.
How 30 years of one man's note-taking is helping scientists find out if spring is arriving earlier. The programme also features BBC Springwatch's nationwide survey, the biggest survey of its kind ever. Show less
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Science for seven- to nine-year-olds.
How 30 years of one man's note-taking is helping scientists find out if spring is arriving earlier. The programme also features BBC Springwatch's nationwide survey, the biggest survey of its kind ever. Show less