News

Paleontology

Reptile remains fill in fossil record

The fossil remains of a sphenodontian, an ancient, lizardlike reptile, are helping fill a 120-million-year-old gap between this creature's ancestors and today's tuatara, sole survivors of the once prominent group.

Earth

Toxic Controversy: Perchlorate found in milk, but risk is debated

Researchers in Texas have detected the chemical perchlorate in milk, crops, and a significant portion of the state's groundwater.

Humans

Nobel prizes go to scientists harnessing odd phenomena

The 2003 Nobel prizes in the sciences were announced early this week.

Neuroscience

Restoring Recall: Memories may form and reform, with sleep

Two new studies indicate that memories, at least for skills learned in a laboratory, undergo a process of storage and restorage that depends critically on sleep.