A1973

Is the neuronal envelope the same as the myelin sheath? If not, where is it located? I have not been able to find a definition for this online.

Why do so many people want to know which animal would win a fight over another or which animal is stronger a lion or a tiger? These questions seem pretty stupid to me. Do these people not have anything better to do than ask questions about things that would never happen? Can someone tell me what the curiosity is?

In preparing for a class I'm going to teach, I thought of something. I know there is a lot of worry about the introduction in the U.S.of the northern snakehead fish that are from Asia. The Snakehead can survive out of water for a time and wallow (not walk) to other bodies of water. Because they are such a voracious predator is why it is feared. I was wondering if there is any "worry" about the Lungfishes that are natives of South America, Australia and Africa getting introduced into the U.S.? Are they not a popular aquarium or food fish so don't end up in the U.S. and getting released? Are they not as serious a predator as the snakehead? The Lungfish can survive in mud with no water. But since they can't wallow to another body of water over land, are they not a threat?

Just thought I'd throw my thoughts out there and see if anyone had some answers.

When the sky is completely overcast in the winter and it is NOT raining are the clouds cirrus? thanks