Archive: 01/29/2007

When Flowing Grains Get Jam Packed

Using color-shifting cylinders as substitutes for sand grains or coal lumps, a Duke University-led team of physicists has pinpointed a critical density level where granular materials suddenly cease flowing ...

Jan 29, 2007
4.4 / 5 (22) 0

How does one sex grow larger than the other?

Why are males larger than females in some animal species (such as most mammals), females larger than males in others (such as most insects), and why are the sexes alike in yet other species (such as several ...

Jan 29, 2007
3.7 / 5 (11) 0

Genes behind animal growth discovered

How many genes influence a complex trait, like weight, height or body type? And why does the answer matter? Among other reasons, because the "Green Revolution" that multiplied crop yields has to be followed by a "Blue Revolution" ...

Jan 29, 2007
3.3 / 5 (3) 0

Anthropologist confirms 'Hobbit' indeed a separate species

After the skeletal remains of an 18,000-year-old, Hobbit-sized human were discovered on the Indonesian island of Flores in 2003, some scientists thought that the specimen must have been a pygmy or a microcephalic ...

Jan 29, 2007
4.7 / 5 (36) 0

Hatching a New Model for Biomineralization

The idea started with an eggshell and ended with a new understanding of how minerals form to build exceptionally strong structures in the bodies of humans and other organisms. Biomineralization, the process by which organisms ...

Jan 29, 2007
4.1 / 5 (11) 0