By Science News Staff
Web edition: June 17, 2011
Print edition: July 2, 2011; Vol.180 #1 (p. 4)
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Credit: P.-G. Bentz
SCIENCE & THE PUBLIC BLOG
LIFE
Larger broods bring more stress for a tree swallow mom (below, with mate), but also more fledglings. See “
Stressed bird moms.”
MATTER & ENERGY
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