By Michael Blake
By Anna Frebel
By David S. Abraham
By Stephen A. Marshall
By Robert McCracken Peck and Patricia Tyson Stroud, photographs by Rosamond Purcell
By Carol Gracie
By George Steinmetz
By Joy M. Kiser
By L. Douglas Keeney
By Paul Martineau
Earth's earliest known forms of animal life were trailblazers.
“Vision” in single-celled Synechocystis works by principles similar to the human eye.
The fate of the Caspian seal may have been decided ﬁve million years ago.
Robber ﬂies are top predators in the insect world.