Speaking from experience- the hole wont close up until about a day after you take it out if you have waited six weeks, but after about 2 hours a layer of skin will grow over the back. if you do it yourselve, or get someone else to, then you can use the earring to go through the layer. just push really hard. it hurts a bit, but is no worse then when you first get your ears pierced.
Temporarily, then it closes.
I believe the closest black hole is in the center of the Milky Way galaxy... But is a black hole a dark hole? Hmm.
Currently (2009dec23), there is no hole in the ozone layer at either pole. The maximum ozone hole size occurred in 2006. So it appears it is no longer growing.See "How did the ozone hole occur?" in the "Related questions" section below.
No, some leave a black hole instead of a neutron star.
The jugular foramen is a hole on the underside of the skull. This is the hole that the jugular vein goes through to reach your brain. In anatomy foramen means opening, so anything with the word foramen implies a hole of some sort. Example: Foramen ovale is a hole in the fetal heart, after birth (and our first heartbeats) There is flap that closes over the hole to prevent blood from mixing between the left and right atrium.
You your ears are newly-pierced and you don't want them, just take the earrings out.
I believe your ear hole closes, because when you don't wear earring's for awhile, the skin just grows together again. It's just like when you get a shot. The hole eventually grows together again. To avoid this, wear earrings continually. In the six month's, even wear earrings at night!
It doesn't take long before a new tongue pierce hole closes because when you open and close your mouth your hole in you tongue just gets used to having nothing in it so i would say about 24 hours before it closes.
guages
Your piercing is an open wound. If you don't keep something in it to keep it from healing then it will close up and you will have to get another piercing. Even after they've healed your skin is constantly making new skin cells, so if you leave your earrings out for a couple of months your skin will fill up the hole with new skin cells and it will close up again.
Temporarily, then it closes.
A pierced belly closes quickly if you have not worn a ring consistently for about a year. If the hole closes, it may just be partially closed and it can be "punched" out again easily.
Earrings can be thick or thin. Generally thick earrings are better for your ear as it keeps the hole open wide so you can fit thicker earrings into it wheras smaller earrings allow the hole to shrink to the size of the metal spoke in the earring. This is why when you get your ears pierced they to it with thick, good quality, gold-backed studs.
Usually just one will fit.
You don't get your ears pierced with earrings. You have them pierced by a needle and then the hole is filled with an earring. There are gold stud earrings which are less likely to cause an allergic reaction.
I believe the closest black hole is in the center of the Milky Way galaxy... But is a black hole a dark hole? Hmm.
Cartilage never heals, at least not entirely, so the answer is subjective. The skin will close back up if the hole is small enough to begin with (22 Gauge is the basic earring post size), but the cartilage will retain it's fistula underneath.