This is almost inevitable with stocking stitch, because the front of the stitch is wider than the back This is why scarves are often knitted in ribbing, which avoids the problem. Another solution is to sew the scarf to a fabric backing.
Knit one row and purl one row is a stockinette stitches that is pretty much a flat look. The edges of the knitting often curl a bit, which is nice for hats and scarves, but not so good in sweaters and such.
It's just the way it turns out, and it can be really annoying when you are trying to make something straight like a scarf, or anything really. The same goes for Stockinette Stitch, which has the tendency to curve around the edges.
If you are trying to work in the round and your crocheting is bowing in at a point where you don't mean it to bow in then you are probably not adding enough stitches per round, or you are working too tightly.
squirrel?
aphids
The reason is pretty much simple its due to the heat that's generated during the printing operation and because only edges do not have equal strain in all directions when water in paper gets evaporated the paper shrinks creating a curl at the edge.
Well you can curl it using tongs and that will temporarily be curly for between a month and 2 months
Genetics
No, too much water does not make the leaves of a citrus tree curl. Hot sunshine is what makes the leaves curl and twist.
A curl can either refer to a ringlet of hair, a curved shape, a spin which makes an object curve, or an exercise which bends the arm, wrist or leg.
A good curl is typically formed by a breakwater wave that shoals rapidly in shallow water, causing the wave to steepen and create a nice curl for surfing.
Makahiya leaves curl when they are touched or disturbed as a defense mechanism against predators. This reaction is triggered by the plant's ability to rapidly move water from certain cells, causing the leaflets to fold inward and appear wilted.