On Earth, the human body knows when to sleep and when to wake up when day changes into night and night changes into day. But what if that doesn't happen? Scientists say there are billions of such planets in the universe where the day-night cycle does not occur.

On planets with eternal day or night, how does alien life know when to sleep?

New research published in the journal Nature has revealed that our brain weakens new connections between cells, or neurons when awake during the first half of a night's sleep.

Brain weakens neuronal connections while you sleep, but only during first half

- By Arpita Goyal Sleep plays an essential role in our daily life. It is defined as a recurring phase characterized by a decrease in body temperature, a decrease in motor activity, and a decrease in consciousness.

How important is a good night’s sleep for better health and productivity?

A growing number of couples are resorting to a concept known as "sleep divorce" in order to reclaim a good night's sleep. According to a recent survey conducted by the American Academy of Sleep Medicine, approximately one-third of couples are choosing to sleep in separate rooms to prioritise their rest and prevent relationship strain caused by sleep disturbances, reported the New York Post.

Separate beds save relationships? How is 'sleep divorce' helping American couples?

Octopuses are masters of camouflage. Amazing shape-shifters, the animals have the capability of deceiving by controlling the size of projections on their skin, they can change colour, and create textures ranging from small bumps to tall spikes.

Do octopuses dream? Study suggests they do as they change colour during sleep

Over the past couple of years, many of us have struggled with sleep due to stress and other challenges amid the Covid-19 pandemic. As per a study published in Sleep Medicine in November 2021 where 22,330 adults from 13 countries were surveyed, one in three participants had clinical insomnia symptoms and nearly 20 per cent had the conditions for insomnia disorder.

10 reasons you are unable to sleep

A recent international study published in 'The Lancet Planetary Health' has shown that excessive hot temperatures at night, caused by climate change can increase the mortality rate around the planet by 60 per cent.

Risk of deaths due to hot night temperatures may increase by 60 per cent: Study

Climate change is leading to significant environmental changes, such as hotter temperatures, melting of glaciers, etc., leading to subsequent changes in our way of living.

Impact of climate change: Rising temperatures could cause hours of sleep loss

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