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A killer whale plays with a ball of ice, soon after a researcher had thrown a snowball at the whale.
Evaluation of a child for cystic fibrosis with a sweat chloride test. Sweat is being collected under
Balmer Lines in the Spectrum of a Star
Comparing fossil patterns of the Hadar Baby, the Taung Child, and Au. Robustus.
Squall lines
Survivorship curves. Blue lines are theoretical curves. Red dots are data from field studies.