THINK great sex has to be long? Think again!  According to new research, the average daytime quickie now lasts just two minutes… but there’s no reason these fast, passionate romps can’t be ...

This internal left-right asymmetry is believed to begin at the very early stage of development -- when a tiny embryo is divided into two parts during a process called gastrulation. This process ...

Most animals, including humans, have bilateral symmetry, which means our bodies are pretty symmetrical. At least on the ...