Twitter seems like a busman's holiday: just more writing. I have no plans to do it. I'll just stick with my 24/7 webcam. I'm old-fashioned that way. — Tina Fey Copy Share Image
We can read your heart rate from a webcam without you wearing anything - we can just use the reflection of your face, which shows blood flow. — Rana el Kaliouby Copy Share Image
