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Tumour cells appear to circulate in the blood more during the night, hinting that therapies should be targeted to maximise their impact at night

Reduced levels of oestrogen and progesterone seem to be what makes post-menopausal women more likely to have symptoms of sleep apnoea, including snoring, irregular breathing or gasping at night

When cats lick and chew catnip or silver vine plants, higher levels of insect-repelling iridoid chemicals are released

The noise of motorboats over the Great Barrier Reef can stress its inhabitants, stunting the growth of young fish and leaving them less likely to live to adulthood

Ishikari Lowland in Japan was converted to farmland beginning 150 years ago, and an analysis suggests it has experienced a 70 per cent drop in bird numbers since then