Reader Bob Fately asks:

When you 'stop down' the aperture of a camera lens and reduce the size of the hole through which light passes, why does the overall scene darken rather than the edges vignette?

A question from reader Craig Westbrooke:

From a very unscientific source, dialog from a scene in the 1976 King Kong movie stated that the oil found on the island would not be usable for another 10,000 years. Is there such a thing as immature oil? Is new oil being made now?

Leonard Monroe wonders: "What would happen if everyone in the world were to jump and land at the same time?"

Post your answer in the comments.

Submit your science and technology questions to fyi@popsci.com.

Once again, you ask and you answer, in the latest installment of our FYI Live feature.

This week, Edward Owens has a poser: "Our universe as far as we know is finite; space is infinite as far as we know. Does anyone think there is another universe, or more out there?"

What do you think? Post your answers below.

Nobody's implying that it's right around the corner, but an old question is on a lot of people's minds these days -- especially you readers.

How will the world end?

Wikipedia has a nice list of some possible scenarios.

What's your favorite? Discuss in the comments.

Reader Nathan asks: "Do you think we'll ever be able to build robot mecha like the Gundams from the Japanese anime series Gundam or the Valkyries from the Japanese anime series Macross?"

The comment box is open. Practical? Plausible? What are the obstacles?

Submit your science and technology questions to fyi@popsci.com.

PopSci reader Dave wants to know: "Hello, if the earth spins east to west why does our wind blow west to east? The wind has to be blowing faster than the earth spinning. Yes?"

Feel free to tackle this one in the comments section.

Submit your science and technology questions to fyi@popsci.com.

Several Florida residents have reported seeing the Leptotyphlops microsnake long before it was announced as a new species, which herpetologist Blair Hedges named for his wife.

Readers want to know: how can you tell if the new animal or plant you've stumbled across is a unique, as of yet unnamed species?

Do you know the answer?

Submit your science and technology questions to fyi@popsci.com.

PopSci reader VectorAKA2004 raises a good question: "I wonder why batteries are lagging behind portable technologies. We advance cell phones and all kinds of things so far and still barely have the power to run them. We have yet to create batteries that can efficiently store solar energy, or other renewable energy sources."

What do you think? Discuss in the comments.

Submit your science and technology questions to fyi@popsci.com.

How can we get our own superpowers? Is exposure to radioactivity a reliable way to go, or cosmic rays, or toxic waste? Perhaps gadget-assisted powers are more within reach.

Discuss your theories, successes, and near-successes in the comments. Also: what power do you most want, and what do you plan to use it for?

Submit your science and technology questions to fyi@popsci.com.

In today's featured reader question, DiGMEH from Montreal wonders "Why not send someone again [to the Moon] now? Technology is better and they have more experience and money for it..."

It's an interesting question. Is it a matter of priorities, of money, of something else?

Submit your science and technology questions to fyi@popsci.com.

We know why the sky is blue, but reader "wondering..." wonders: "why is our urine always white or yellow? even after we drink orange juice or cola our urine is always white or yellow."

Thought-provoking, no? Have your say in the comments.

Submit your science and technology questions to fyi@popsci.com.

PopSci reader aaronmrosen wonders: "when it comes to wind farms, can too many props actually slow down the wind, and cause a change in weather patterns?"

What do you think? Wind power: good or evil? Discuss in the comments section.

Submit your science and technology questions to fyi@popsci.com.