Therefore, a blackout affects any market where the terrestrial broadcast signal of an affiliate station, under normal conditions, penetrates into the 75-mile radius.

Included are any non-profit terrestrial broadcast community radio stations not directly affiliated, owned, controlled by any radio network, school, company, or government.

It will also use fibre networks, other communication satellites, and terrestrial broadcasts, as well as elements of the present satellite network.

Laws about antennas were updated before the change to digital terrestrial broadcasts.

In other cases government policies have been introduced to encourage or force the switchover process, especially with regard to terrestrial broadcasts.

The lack of large terrestrial vertebrate predators and the highly oxygenic atmosphere at that time probably enabled them to grow so large.

Marine faunas became fairly modern, as did terrestrial vertebrate fauna on the northern continents.

It uses its flexible toes to grab prey -- large arthropods and small to mid-sized terrestrial vertebrate.

Sometimes known as perching birds or, less accurately, as songbirds, the passerines form one of the most diverse terrestrial vertebrate orders, with over 5,000 identified species.

For example mammaliformes (almost mammals) and then mammals existed throughout the reign of the dinosaurs, but could not compete for the large terrestrial vertebrate niches which dinosaurs monopolized.