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Health & MedicineStem cell research marches on
Cells from human embryos can be transformed into heart cells or insulin-secreting cells.
By John Travis -
PaleontologyCompleting a titan by getting a head
When paleontologists unearthed the skeleton of a 70-million-year-old titanosaur in Madagascar in the late 1990s, they also recovered something that had been missing from previous such finds: a skull that matched the body.
By Sid Perkins -
PaleontologyThat’s no footprint, it’s got no toes
The impressions near Isona, Spain, long thought to be fossilized dinosaur footprints may actually record the feeding behavior of stingrays.
By Sid Perkins -
AnimalsBig woodpeckers trash others’ homes
Pileated woodpeckers destroy in an afternoon the nesting cavities that take endangered red-cockaded woodpeckers 6 years to excavate.