So modelers have had to come up with ways to get these centimeter-sized clumps to cluster together into the larger objects that eventually become comets.
Humans might be making it even tougher: Each year we dump more than 4 million metric tons of plastic into the ocean, where it breaks down into pieces small enough to get snapped up by these centimeter-long swimmers.
These centimeter-scale seeds browsed on the ground by the deer differ in size from the millimeter-scale seeds found in their dozens per bramble fruit (blackberries).
These 20-centimeter-long, insect-eating birds breed in mountains ranging from southern Europe to the Himalayas.
These 2-centimeter-long plastic tubes filled with explosives, triggered by electrical wires, delivered 10-millisecond bursts.
Keller and company equipped these 15-centimeter-tall subjects with wheels, a camera, a ground sensor, and a virtual "genome --a computer progenome --adictated their responses to their environment.
Observing wild archerfish in Thailand, biologists Peggy Gerullis and Stefan Schuster of the University of Bayreuth in Germany found that these 25-centimeter-long fish can squirt water at prey as far as 2 meters away, which requires the jet to only become fully focused right before hitting the target for maximum impact.
Thanks to the stunning preservation, the researchers could not only discern a heart and a circulatory system in these 3-centimeter fossils, but also some of the hallmarks of chordates, such as a dorsal nerve cord and a notochord, a rod of stiff tissue that provides support along the back of the body.
And when a peacock mantis shrimp attacks one of these 6-centimeter-long clams, the shrimp quickly recoils as if stung or tasting something really terrible, the researchers reported here today at the annual meeting of the Society for Integrative and Comparative Biology.
These 3 centimeter (1.2 in) of normal paper will be glued on the first and last normal sheets of the inside of the book.
