INPUT ARTICLE: Article: For this experiment, the globe will represent a round earth, and the map will represent a flat earth. The lamp in the middle will be the sun. This experiment works best when it's dark out or all the windows in the room are covered. You want the light coming from the lamp to be the only light in the room. Look at the globe and notice how half of it is lit up and half of it is dark. Then, notice how the map is completely illuminated. The globe does, right? After all, if the earth was flat like the map, then all of the earth would be lit up by the sun at the same time. That wouldn't make sense, since we know that the whole world doesn't experience day and night at the same time. With the globe, half of it is lit up while the other half is dark. That's the same as what we observe here on earth half of the world experiences day while the other half experiences night. Therefore, it makes sense that the earth is round!

SUMMARY: Place a lamp in between a globe and a world map. Turn off all the lights in the room except for the lamp. Observe how the light shines on the globe and the map differently. Ask yourself whether the round globe or flat map seems more realistic.

INPUT ARTICLE: Article: For 3-7 days, track when, what, and how much you drink, and when and how much you urinate. After several days, you'll likely start to notice clear patterns to your urination habits. Ideally, you should use a collection cup to record how much you urinate each time. Alternatively, you can just estimate the amount as "a lot," "average," and "a little." After you've kept track of when you usually urinate, build a schedule around this data. To start out, try to set up the schedule so that you urinate every 2 to 2.5 hours during the daytime. For example, schedule a "pee break" when you wake up (6:30 am), then when you arrive at work (9:00 am), then right before your lunch break (11:30 am), and so on. Do your best to stick to your schedule. Waiting 5-15 minutes can help stretch your bladder so that, over time, it can hold more urine. If you really need to go, however, just go. If you start your schedule by urinating every 2 hours, move to 2.25 hours between restroom visits the next week, then 2.5 hours the week after that. Your end goal should be to urinate every 3-4 hours. While the average adult urinates every 3-4 hours, this may not be manageable for you. Stretch out your pee breaks slowly, and stop when you seem to have reached your limit. To practice, start urinating, then make yourself stop the stream of urine by contracting your muscles. These are the muscles of your pelvic floor. Once you know what it feels like to contract the pelvic floor muscles, you can do Kegel exercises at other times throughout your day. Try doing Kegel exercises during commercials while watching your favorite show, sitting at your desk, lying down, or filling up your car with gasolineyou can do them at almost any time, really. Try to do these exercises at least 3 times a day and at least 3-4 days a week. If you continue to need to urinate frequently despite your efforts to retrain your bladder, visit your doctor for a checkup. If you have to pee frequently and urgently, you may have an over-active bladder (OAB), which is a rather vaguely-defined medical condition that should be diagnosed by your doctor. OAB can often be treated by making healthy lifestyle changeslike improving your diet, exercising regularly, losing excess weight, and quitting smokingand possibly by taking medication. Also speak to your doctor if you have any type of issues with incontinencethat is, releasing urine when you don't intend to.

SUMMARY:
Keep a "pee diary" for about 1 week to chart your habits. Set a comfortable urination schedule. Slowly extend the amount of time between pee breaks. Do Kegel exercises to strengthen your pelvic floor muscles. Talk to your doctor about any bladder control issues.