Each DNA molecule in the body contains two long strands of chemical letters, or bases--A, T, C and G--that come together like a twisted ladder (a.k.a. the double helix).

FORBES: Magazine Article

"I lost my goals of getting a four-year college degree and moving up the ladder like everyone else wants to do, " she said.

CNN: Rural America has a teen pregnancy problem

With all the guards in the towers looking at the fight through binoculars, the two men tipped a picnic table up against a twelve-foot wall and climbed it like a ladder.

NEWYORKER: Hellhole

It looks like a garden shed mounted precariously on six-metre-high stilts, and the ladder wobbles as I climb.

BBC: Poland's wild woods