Stories by Chip Walter

Researchers are revealing hidden complexities behind the simple act of kissing, which relays powerful messages to your brain, body and partner

At least 27 human species have walked the Earth, but only our lineage survived. Our ancestors may have crossed a cerebral Rubicon that led to babies being born “early”

Researchers are revealing hidden complexities behind the simple act of kissing, which relays powerful messages to your brain, body and partner

Researchers are revealing hidden complexities behind the simple act of kissing, which relays powerful messages to your brain, body and partner

Computer scientist Latanya Sweeney helps to save confidentiality with "anonymizing" programs, "deidentifiers" and other clever algorithms. Whether they are enough, however, is another question

In a post-9/11 world, where security demands are high, personal privacy does not have to be sacrificed, says computer scientist Latanya Sweeney, who discusses a few ways to save it.

Other animals howl when they are in distress, but only humans weep tears of sorrow—or joy

The doubling of processor speed every 18 months is a snail's pace compared with rising hard-disk capacity, and Mark Kryder plans to squeeze in even more bits

He says humans will download their minds into computers one day. With a new robotics firm, Hans Moravec begins the journey from warehouse drones to robo sapiens