But that's exactly what i explained above, and which is also explained in your pull quote. It's not that also using women's voices would've been harder, it's that doing so would've been a worse study design. A good study narrows down factors to as few as possible.
When designing a study researchers limit the method to include only the factors that they think are most likely to find a signal out of the noise, and if a positive result is found then they will do further studies to test additional factors. The factors chosen to include or exclude are by necessity based on previous research results or assumptions based on available evidence.
So i would guess that when the researchers were designing this study they chose to only include male voices because of previous research or assumptions that seagulls would've had more experiences of hostility from human men than women, or maybe based on males of most species generally being the more aggressive of the sexes, or something else like that.
If you read the study paper itself (which i haven't done) i would bet they explain their exact reasoning
That still makes me think you're living a better life than me. There's no way I'd want to chance living through another lifetime that's similar to this one. And even further i think in total the number of lives that are worth experiencing are in the small minority; I think most people's lives don't have a level of pleasure that is worth the amount of suffering and drudgery they go through
He didn't curse in that line. In fact he didn't curse much generally. I don't have any objection to curse words, it just doesn't sound like his voice when you add curse words in.
Fuck shit ass titties. I just had to get that out after talking about not cursing
That's why we need to find a natural mirror somewhere already out there, so we can see into our past. Something like a planet made of pure mercury, or an arrangement of blackholes doing gravitational lensing that bends our light back to us, or whatever. We'd also need instruments vastly superior than what we currently have in order to get any useful information out of seeing our own light bounced back to us from so far away
... But still! the idea that it's at least hypothetically possible to actually see our own past is very exciting!
Per the OP's post: