Q. The moon's size, as viewed by the naked eye from earth, appears larger at some points on the horizon and smaller at other points.  What accounts for this difference in the moon's apparent size?

Q. Should we rinse cans and bottles before we recycle, or does that just waste water? 

Q. I love seedless watermelon—but I wonder how future crops are germinated if they are seedless?

Q. What are the most efficient ways that carbon can be removed from the atmosphere?

Q. "How do I explain to my 15 year old son the value of knowing the quadratic equation in everyday life?"

Q. "I don't know much about the Big Bang Theory, but it's myunderstanding that the universe started by some large explosion. Whatkind of chemicals would have been involved, and how did these chemicalsoriginate in the first place?"  

Q. What is the biological or chemical explanation for thatfeeling I get when I hear a favorite song or see a moving performance,and I get tingles, or goose bumps, on the back of my neck and arms? 

Q. This summer, CERN (the European Organization for NuclearResearch) will launch operations of the Large Hadron Collider - a17-mile, circular particle accelerator buried 300 feet belowSwitzerland and France. There is a lot of controversy about the safetyof the collider, especially its potential to create black holes, whichcould annihilate the Earth. Is this dangerous?

Q. With so many birds in the world, and in our urbanenvironment, you would think we would see dead birds all over theplace. But we don't. So, where do birds go to die?

Q: Weight loss is based on expending more energy than consumed, and forevery 3,000 calorie deficit you lose one pound. Assuming both an obeseperson and someone slightly overweight eat proportionate calories andexercise at equal levels, why does the obese person lose a lot moreweight in the same amount of time than the slightly overweight person?

Q. Iowa and New Hampshire aren't exactly representative of the nation as awhole and yet they have so much influence on the presidentialnominating process. Why are these states first every time?

Q. Would taking steroids or human growth hormone for a brieftime, to aid recovery from an injury, be worth it? As a 50-plus athleteI don't care about improved performance, I care about decreasing injuryrecovery time.