1 Chronobiology is the study of how living things have evolved over time.
2 The rise and fall of sea levels affects how sea creatures behave.
3 Most animals are active during the daytime.
4 Circadian rhythms identify how we do different things on different days.
5 A night person' can still have a healthy circadian rhythm.
6 New therapies can permanently change circadian rhythms without causing harm.
7 Naturally-produced vegetables have more nutritional value.