When holes opened up in the earth recently in Siberia, a wave of speculation was set off as to their cause. Scientists are now pinpointing a dramatic increase in arctic thawing, which may have released methane once trapped below the frozen ground. For a better understanding, Judy Woodruff talks to Tom Wagner of NASA. Continue reading
The bones of a baby boy buried in Montana 12,600 years ago may help scientists confirm the origins of North and South America’s first peoples.
The remains were discovered when a construction dig on the Anzick family property overturned a grave in southwestern Montana in 1968. Archeologists determined the boy was between 12 and 18 months old when he died, although the cause of death is still a mystery. Continue reading