FOR 40-odd years now, as Barack Obama lamented on March 30th, American politicians have banged on endlessly about the evils of America's dependence on imported oil, without doing very much about it.
Less colorful birds and animals that inhabit the rain forest tend to rely on forms of signaling other than the visual, particularly over long distances.
If it is trying to upset Google, which relies almost wholly on advertising, it has chosen an indirect method: there is no guarantee that DNT by default will become the norm.
Celiac disease is a condition in which the immune system attacks and damages the villi of the small intestine upon the consumption of gluten - a protein found in wheat, barley and rye.
The later species all depend on the preparations of the earlier one, for the actions of the zebra alter the vegetation to suit the stomachs of the wildebeest, topi, and gazelle.