is confirmed.

Female mammals follow their noses to the right mates.

many mammal species are sexually active at night. So mammals may be less inclined than birds to base preferences on visual cues. Instead, females of many mammalian species may be more likely to choose males using olfactory cues.

Research has shown that female mammals commonly investigate scent marks left by males. Females also show a preference to mate with males who scent mark more frequently.

Just what can a female learn about a male through his scent? Plenty, say Clutton-Brock and McAuliffe.

Recent studies have shown that mammalian females use scent to pick out genetically dissimilar males. Parents with dissimilar genes in a certain part of the genome tend to produce healthier offspring. So male mammals advertise their genotype via scent, and females pick up the signal and preferentially mate with dissimilar males. This ability to sniff out a good genetic match has been found in mice and humans.

For years, international agencies concerned with health and nutrition have promoted seafood consumption. "Our concern is that fish stocks are under extreme pressure globally and that studies are still urgently required to define precisely who will benefit from fish oil," . . .

While many studies show healthy benefits of consuming omega-3 fatty acids, found in fish oils, some other studies fail to show significant benefits. But these negative studies are often ignored and the result is that there is increasing demand for seafood by consumers in the developed world, often at the expense of food security in developing nations. . . .

Furthermore, dietary recommendations to consume more fish are incompatible with the sustainability of ocean ecosystems.

intelligence is strongly influenced by the quality of the brain's axons, or wiring that sends signals throughout the brain. The faster the signaling, the faster the brain processes information. And since the integrity of the brain's wiring is influenced by genes, the genes we inherit play a far greater role in intelligence than was previously thought.