It's no secret that David Attenborough nature documentaries have a tendency to make viewers emotional.
But one scene from the 92-year-old's most recent programme has left viewers in tears.
In a particularly traumatic scene in Our Planet on Netflix , a number of walruses are seen falling off the edge of cliffs, plunging to their deaths.
The documentary blames the tragedy on climate change, claiming a mixture of melting sea ice and poor vision drove the walruses to the cliff edge.
However experts are now suggesting that this may not be the case.
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Zoologist Dr. Susan Crockford from Canada has claimed the documentary makers are lying about the footage in order to push their climate change agenda and has accused them of using it as "tragedy porn".
She argues that climate change isn't responsible for the death of the walruses and instead suggests that it was a "natural event" most likely caused by polar bears.
Speaking to Mirror online, she said: "More walruses are hauling out and dying from falls and trampling because they are more abundant now than they have been in more than a century.
"Our Planet producers are spinning a bogus tale to promote an agenda using deliberately misleading footage and commentary."
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Dr. Crockford further explored this in a post on her website , in which she wrote: "The lie being told by Attenborough and the film crew is that 200-300 walruses fell during the time they were filming, while in fact they filmed only a few: polar bears were responsible for the majority of the carcasses shown on the beach below the cliff.
"This is, of course, in addition to the bigger lie that lack of sea ice is to blame for walrus herds being on shore in the first place."
In addition to this, she believes the footage shown in the documentary was actually filmed following an incident in 2017 in Siberia and has been cleverly edited.
Reported on by The Siberian Times, the event saw around 20 polar bears spook a herd of walruses on a cliff at Kozhevinkova Cape - causing hundreds to fall to their death.
She continued: "The film crew have steadfastly refused to reveal precisely where and when they filmed the walrus deaths shown in this film in relation to the walrus deaths initiated by polar bears in the fall of 2017.
"I can only conclude, therefore, that the two incidents are indeed essentially one and the same."
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Sophie Lanfear, the producer of Our Planet has since denied these claims, insisting that polar bears had nothing to do with the deaths.
She told The Telegraph: "We filmed pacific walrus falling from high cliffs. They were not being driven off the cliffs by the polar bears and we know this because we had two team members watching the cliffs from afar who could see the polar bears and were in radio communications with us to warn us about any bears approaching the crew closer to the walrus and the cliffs.
"Once the walrus had rested at the top for a few days they wanted to return to the sea when all the other below started to leave. We would watch them for hours teetering back and forth on the edge before finally, falling off.
"Fundamentally, the reason walrus used this haul out location is because of a lack of sea ice in the region, meaning they are coming ashore more frequently than they did in the past. And at this particular site, once the beach below the cliffs was full, they spread out and up the cliffs and were unable to find their way safely down, with tragic consequences."
Netflix have been contacted for further comment.
