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Researchers measure whales ‘sleeping’ for first time

Christian Wenande
December 28th, 2022


This article is more than 2 years old.

Researchers in Greenland have managed to collect new data showing that the massive mammals lie still for several extensive periods

Groundbreaking research out of Greenland (photo: Pixabay)

Researchers from the Greenland Institute of Natural Resources may have become the first to measure the ‘sleeping patterns’ of whales.

The researchers found that the big mammals had several inactive periods under water by using acoustic probes attached to bowhead whales using suction cups or harpoons – which would fall off and rise to the surface after a few days to be collected for data retrieval. 

More specifically, the data showed five periods during which the whale was at a constant depth of 16-38 metres for 24-48 minutes at a time. The periods were only broken by the whale rising to the surface for air.

READ ALSO: The world’s oldest DNA: remains found in Greenland are 2 million years old!

Drift diving = sleeping?
This kind of ‘drift dive’ has also been seen in humpback and sperm whales, as well as some species of seal. 

The researchers believe that the whales are actually asleep when this happens.

And what’s also interesting is that the whales were able to ‘sleep’ despite being recently tagged by tracking equipment.


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A survey carried out by Megafon for TV2 has found that 71 percent of parents have handed over children to daycare in spite of them being sick.

Moreover, 21 percent of those surveyed admitted to medicating their kids with paracetamol, such as Panodil, before sending them to school.

The FOLA parents’ organisation is shocked by the findings.

“I think it is absolutely crazy. It simply cannot be that a child goes to school sick and plays with lots of other children. Then we are faced with the fact that they will infect the whole institution,” said FOLA chair Signe Nielsen.

Pill pushers
At the Børnehuset daycare institution in Silkeborg a meeting was called where parents were implored not to bring their sick children to school.

At Børnehuset there are fears that parents prefer to pack their kids off with a pill without informing teachers.

“We occasionally have children who that they have had a pill for breakfast,” said headteacher Susanne Bødker. “You might think that it is a Panodil more than a vitamin pill, if it is a child who has just been sick, for example.”

Parents sick and tired
Parents, when confronted, often cite pressure at work as a reason for not being able to stay at home with their children.

Many declare that they simply cannot take another day off, as they are afraid of being fired.

Allan Randrup Thomsen, a professor of virology at KU, has heavily criticised the parents’ actions, describing the current situation as a “vicious circle”.

“It promotes the spread of viruses, and it adds momentum to a cycle where parents are pressured by high levels of sick-leave. If they then choose to send the children to daycare while they are still recovering, they keep the epidemic going in daycares, and this in turn puts a greater burden on the parents.”