Researchers have created a video-modifying program that transfers the expressions of a subject onto live video of another subject’s face in real time. The video warrants cliché: it has to be seen to ...

Protein synthesis is a multi-step process. It is typically initiated by the activation of a transcription factor (TF), which binds the promoter sequence of a gene. This active TF allows the ...

Severina Rocha from Brazil writes: Would you please help me to identity which time expressions go with which tenses, e.g. not long ago, a little while earlier, till midnight, and so on? Betty Chan ...