Recent comments in /f/askscience

coconut-gal t1_j9kg7di wrote

I've heard it's because of their rare status as a flying mammal. In short, keeping their weight aloft when they aren't as well adapted to flying as, say, birds which have hollow bones, means they have to be exceptionally tough, and this includes having a highly robust immune system.

Robust immune system means they are ideal carriers because they can contact loads of viruses without becoming incapacitated, and coupled with their ability to cover reasonable distances they have the opportunity to spread them.

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softserveshittaco t1_j9kfg1w wrote

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Curious-Accident9189 t1_j9ke8ye wrote

I have yard chickens with unclipped wings and pigs in an enclosure. I live in a remote rural area with a significant coyote and black bear population, yet I've not had problems with either one in 2 years. I have 4 dogs of varying size and I often hike the nearby woods and walk my property line.

It's cuz I pee outside isn't it?

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CassandraVindicated t1_j9kckvu wrote

I had a coyote as a pet for about 14 years. I never had a problem with vets treating them. She was one of the best 'dogs' I ever had. What's your opinion on that, and was there anything I should have absolutely paid attention to in recognition of the difference between them and dogs?

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atomfullerene t1_j9kbtqk wrote

>are there any other examples of this in nature?

It's pretty common, but doesn't always happen.

>do ligers have the same issue in terms of reproducing?

Ligers are generally fertile. Note that it's not a hard cutoff, there's a range between hybrids that are almost always fertile and those that are almost always infertile. Plenty of species fall in the middle ground.

>is this why a chimpanzee and a human couldn't reproduce?

This has never really been thoroughly investigated, so we don't actually know if hybrids are possible. Hybrid incompatibility is about more than just differences in chromosome number, though. Specific adaptations can make egg and sperm incompatible (related species with overlapping ranges sometimes have adaptations like this to prevent hybrids) and sometimes the details of genetics can make hybrids nonviable.

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