Live data from Hacker News

Drone footage of fledging penguins jumping off cliff

petapixel.com

81–90 of 93 posts

Re: Drone footage of fledging penguins jumping off cliff

#81

Earlier quoted context omitted.

Sounds in almost all nature documentary videos are added later from separate sources.

That makes sense. I'd never thought about it. You've saved me the disappointment of visiting Antarctica to realize that David Attenborough's voice doesn't just chime in whenever you look at something.

Surprisingly, the voice is the only part of the audio that's real.

Re: Drone footage of fledging penguins jumping off cliff

#82

Earlier quoted context omitted.

Sounds in almost all nature documentary videos are added later from separate sources.

That makes sense. I'd never thought about it. You've saved me the disappointment of visiting Antarctica to realize that David Attenborough's voice doesn't just chime in whenever you look at something.

Been to Antarctica twice. Attenborough's voice definitely chimes in.

Re: Drone footage of fledging penguins jumping off cliff

#83
post #74
post #73

Earlier quoted context omitted.

Or, as Haldane wrote in “On being the right size” ( https://en.wikipedia.org/wiki/On_Being_the_Right_Size : “You can drop a mouse down a thousand-yard mine shaft; and, on arriving at the bottom, it gets a slight shock and walks away, provided that the ground is fairly soft. A rat is killed, a man is broken, a horse splashes. For the resistance presented to movement by the air is proportional to the surface of the mov…

That’s half the equation and explains why speeds are lower. There’s another square cube relationship around the volume of an object vs the impact area.

And tensile strength of muscles and bones, which is proportional to cross-section area, hence also is tenfold stronger relative to mass.

Re: Drone footage of fledging penguins jumping off cliff

#84
post #74

Earlier quoted context omitted.

That’s half the equation and explains why speeds are lower. There’s another square cube relationship around the volume of an object vs the impact area.

And tensile strength of muscles and bones, which is proportional to cross-section area, hence also is tenfold stronger relative to mass.

[deleted]

Re: Drone footage of fledging penguins jumping off cliff

#85
Pretty cool, but what is "the secret".

First, the heading wording feels like intentional clickbait to make at least a portion of people think they might be jumping to their death, they don't!

They build something up like there is something coming, some actual reason WHY they do it from that high. But they totally failed on delivering any reveal, at least in the video, did not read the entire article.

They made up to be some giant mystery, and I was expecting there is some kind of great reveal thing that has some kind of benefit, something evolutionary or whatever something, - nothing - absolutely nothing. Basically because they did not want to walk down a long way I guess, if there even was a way to an easier jump.

Re: Drone footage of fledging penguins jumping off cliff

#87
post #59

Earlier quoted context omitted.

There's edible fish in the water. What other food is there on the ice?

Penguins enter the water all the time to hunt fish. Not off cliffs.

>Every January, when the chicks are around five months old, they undergo a process known as fledging. During this process, the chicks lose their baby feathers and leave their colony for the first time — jumping from an enormous cliff into the ocean to take their first swim.

It was their first swim. Maybe the cliff was the closest shore

Re: Drone footage of fledging penguins jumping off cliff

#89
post #29

Very odd footage imo. * most of the birds are falling in because they’re pushed, not because they’re jumping * most of the birds are belly flopping hard rather than diving in with any sort of graceful entry * most birds don’t appear to ever jump. I refuse to believe the camera wouldn’t have shown the whole population in the water if they had

I don't think there is any reason to think a belly flop would have the same effect on a penguin as it would on a human.

Surely there is one: gravity and water tension work the same for both.

Re: Drone footage of fledging penguins jumping off cliff

#90

Pretty cool, but what is "the secret". First, the heading wording feels like intentional clickbait to make at least a portion of people think they might be jumping to their death, they don't! They build something up like there is something coming, some actual reason WHY they do it from that high. But they totally failed on delivering any reveal, at least in the video, did not read the entire article. They made up to…

Seems common for documentaries about nature. A few seconds of good footage surrounded by minutes of filler and clickbait.
Post reply on HN