grain

The wide head and narrow oval tail create a slope for each grain, leading to spin and rolling motion when sliding down slopes.

"The layer where we found Uncus is particularly exciting because the sediment grains are so small that we really see all the details of the fossils preserved there."

The debris, which can be as fine as a grain of sand, burns up with the friction as it hits the Earth's atmosphere.

He would welcome efforts to crack down on the amount of salt allowed in foods and to curtail consumption of added sugars, refined grains and sugar-sweetened beverages.

Trump is known for defying tradition and going against the grain, but the recent appointments suggest a larger agenda, some political observers say.