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The heartbeat of a blue whale is recorded for the first time

Blue Whales can survive with two beats per minute in the ocean depths and now for the first time heartbeat of a blue whale is recorded.

heartbeat of a blue whale is recorded

When a blue whale feeds, it skips several heartbeats, sometimes up to 30. this is what a team of marine biologists has discovered after being able to record the heartbeat of a blue whale, on the coast near California. To do this, a suction pulse monitor was placed on his back.

The researchers watched as the marine giant emerged and submerged again for a period of almost 9 hours, alternately filling its lungs with air and its stomach with appetizing schools of fish hundreds of meters below the surface.

During the dives, the whale’s heart has brutal ups and downs, pumping from 34 times per minute on the sea surface to only 2 per minute at the deepest depths – between 30 and 50% slower than expected to be recorded.

According to the new study published in PNAS, the simple act of opening the mouth to eat takes the heart of the cetacean to its physical limits, something that could explain why there are no creatures larger than the blue whale on the planet.

“Animals that function at physiological extremes can help us understand the biological limits of size,” said lead author Jeremy Goldbogen, an assistant professor at Stanford University in California. “In other words: if the heart of a whale is not able to pump faster during the effort required in the search for food, how could it support the heart of an older animal and provide the required energy?”

The largest animal in the world Blue Whale

Blue whales are the largest creatures that have ever inhabited the oceans (the Patagotitan mayorum dinosaur was consecrated as the largest terrestrial creature that has stepped on the planet, after its study and classification in 2014 ).

Upon reaching adulthood, the blue whale can be more than 30 meters long, more or less the length of two school buses parked one after the other. It takes a big heart to drive a beast of such size; and while this organ is not so large that a human can swim inside one of its arteries, as an urban myth says, the truth is that stranded whales have allowed hearts to recover up to 200 kilograms and the size of a golf cart .

Blue whale heart. With a weight of 200 kg, it was extracted from a specimen that found its final destination on the coast of Newfoundland, Canada, in 2014. heartbeat of a blue whale is recorded
Blue whale heart.
With a weight of 200 kg, it was extracted from a specimen that found its final destination on the coast of Newfoundland, Canada, in 2014.

Scientists already knew that the pulse of these cetaceans decreased in the aquatic environment. When mammals submerge, their bodies automatically begin to redistribute oxygen; The heart and brain are the ones that most demand oxygen, while your muscles, skin and other organs receive less. This allows animals to stay underwater for longer with a single inhalation, resulting in a lower than normal heart rate. This is so true for humans who like diving as for blue whales, however, given the enormous size of the whale and its ability to reach 300 meters below the surface, their hearts are pushed to limits beyond our own. .

Change in the heartbeat of a blue whale with change in depth

In the creature studied, its maximum immersion lasted 16.5 minutes, reaching a depth of 184 meters. On the other hand, he never spent more than 4 minutes on the surface to fill his lungs with air.

The sensor set by the scientists showed that in the deepest dives, the heart of the whale beat at an average rate of 4 to 8 times per minute, with a minimum of only 2 beats per minute. “During these beats that were so temporarily separated, the flexible aortic artery of the animal contracted to maintain a slowed movement of the oxygenated blood through the body,” the researchers write.

Back on the surface, the heart rate accelerated rapidly to 25 to 37 beats per minute, charging the bloodstream with enough oxygen to support the next dive. “At that time the heart of the whale was working near its physical limit,” the authors add. “It is unlikely that your heart can beat faster than that.”

Source: Live Science

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Planet Earth

Hundreds of Birds Die Mysteriously in Rural Area of Wales

David Sims / Cover Images / SIPA

Things mysteriously falling from the sky is one of the classic Fortean phenomena. Birds dying from no apparent cause is another. That winning (or losing) combo occurred this week in a rural town in Wales no one has yet been able to explain the hundreds of dead starlings – many with their internal organs outside their bodies – found on an unclassified road near near Llyn Llywenan in Bodedern on Anglesey, an island off the north-west coast of Wales. With mysterious circumstances and no official explanation, the strange and conspiratorial theories abound.

“There’s easily more than 300 of them. I counted 150 last night but I gave up as there’s just hundreds of them littered everywhere. It’s as if they just dropped down dead from the sky.”

Dafydd Edwards reported on social media that his partner, Hannah Stevens, found the birds while driving home. She claimed that on the afternoon of December 10 she had seen a “massive flock” flying overhead before landing to eat something on the road. Less than an hour later, she said they were dead where they had been eating. It’s not clear how she arrived at that short timeframe from flying to dead in the road.

“It’s very strange, I can’t put my finger on it. There are still some alive in the hedges today but it’s all unexplained at the moment.”

As seen in Edwards’ video and photos (see them here and here), the vast majority of dead birds were in the road, where he counted 150 before quitting. North Wales Police’s Rural Crime Team counted at least 225 and some witnesses estimated the total to be over 300. They collected the carcasses (identified as starlings) and sent some to a lab for examination and toxicology tests, which means they assume the birds were somehow poisoned. Locals were not so sure.

“It’s unlikely that the birds would have been in contact with an aircraft – RAF or civilian. Bird strikes can have quite an effect on aircraft, and can cause severe damage. Even minor bird strikes are reported as a matter of course at RAF Valley, and no such reports have been fed back by our personnel.”

The Ministry of Defence answered speculations that the birds had been hit by low-flying planes with that denial. On the act-of-God side, there was talk that the birds might have been caught up in strong winds or stunned by a sudden lightning strike or loud sound, but Hannah Stevens did not report any unusual conditions. The current cause-of-all-bad-things – 5G – was blamed but no other birds or wildlife seem to be affected. A sign of the apocalypse? We’re still here and so are the residents of Llyn Llywenan.

“We’re hearing one story that it happened in exactly the same place many, many years ago so we’re just trying to confirm that as well.”

Rob Taylor, Team Manager for North Wales Police’s Rural Crime Team, added to the mystery by pointing out that locals claim another similar dead bird incident happened in the same area about 12 years ago, but no details were given and Internet searches turned up nothing.

As of this writing, the North Wales Police indicated they believed they know the cause of this mysterious bird kill but were awaiting the toxicology report. That hints of a suspicion of poisoning of some sort, which would seem to be one of the most likely causes. However, that memory of a previous event makes one wonder if something more sinister – something pre-5G – may be happening underground in Llyn Llywenan. Is anyone checking for unusual human conditions, cancers, deformities or mental illnesses amongst the residents?

Will there be a consensus? Will officials admit it if the cause is not poisoning?

What would Charles Forte think?

Source: Mysterious Universe

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Asteroid Will Make Close Fly by of Earth on Friday the 13th

NASA has been monitoring an asteroid which maintains an orbit around various bodies in the solar system and consistently passes through Earth’s orbit with the sun. 13 near-Earth objects in total are expected to fly past Earth in December of this year.

Earth is set to have a close encounter with an enormous asteroid which is set to fly nearby Earth on Friday at a speed of almost 18,000 miles an hour (more than 28,000 km/h), according to NASA.

The upcoming pass-by is estimated to happen on 8:25 am on 13 December, the unlucky Friday the 13th. The asteroid’s orbit diagram indicates that the near-Earth approach will follow the rock’s intersection with Earth’s orbit.

According to the space agency’s Center for Near-Earth Object Studies (CNEOS), the asteroid has an Earth-crossing orbit with the sun and will not approach from a diagonal or perpendicular direction and instead will flyby perpendicular to earth.

It is expected to pass by earth at a shockingly close 0.03033 astronomical units, around 1.9 million miles (more than 3mn km) away.

NASA has dubbed the asteroid 2019 XO1 and estimate that it is around 243-feet wide, about the width of a Boeing 747 plane.

According to CNEOS, 2019 XO1 is classified as an Aten asteroid, meaning that its orbit circulates around a number of celestial bodies in the solar system including the Sun, Venus, Mercury, and Earth.

The asteroid has a tendency to intersect its orbit with Earth’s, typically when it is furthest away from the sun.

3 December marked the first time 2019 XO1 was identified in its frequent encroachment on Earth. It also comes close to Mercury and Venus but, unlike its proximity with Earth, it does not cross the paths of the two other planets.

The body first came near Earth on 17 November 2013, missing the planet by 0.09488 astronomical units, around 8.8 million miles.

Following its passing on Friday the 13th, the asteroid will not come back from Earth’s outcrop of the solar system until December 22, 2022, where it will creep as close as 0.09534 astronomical units, up to 8.9 million miles (more than 14Mn km) away.

Sputniknews
Image credit: © CCO

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Planet Earth

Los Angeles and Chicago Are Readying to Erase 68,000 Nonviolent Marijuana Convictions

Phillip Schneider, Staff Writer
Waking Times

The cities of Los Angeles and Chicago are taking a big step toward ending the damage caused from the war on drugs by getting ready to expunge nearly 70,000 non-violent marijuana convictions from citizen’s criminal records.

Kim Foxx, Cook County’s State Attorney in Chicago, is preparing to eliminate misdemeanor convictions of close to 18,000 residents which she argues will help mostly racial minorities get back into the housing and job markets, whereas having these cannabis crimes on their record sets up a barrier between them and these life essentials.

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