The amount of books in Library of Congress is more 58 million volumes.

It is necessary that the director will sign all the copies, not just top one.

There is evidence that the caribou originated into North America and crossed over all land bridge into Asia and evolved into Old World’s reindeer

You are going to come to the party, ____?

Some jellyfish make daily journeys from deep water to surface and back, while others migrate horizontal

The word  “scuba: is actually an acronym that comes of  words “self-contained underwater breathing apparatus”.

Some snakes have hollow teeth are called fangs that they use to poison their victims.

Our primary goal is to teach students to discover the truth. But we have also other aims, such as providing them with knowledge or to teach them to work consciously

Protecting Florida’s coral reefs is difficult because some of the corals are very fragile even the touch of diver’s hand can kill it.

Petrography concerns primarily with the detailed description and classification of rocks, whereas petrology deals primarily with formation.

Each chemical element is characterized to the number of protons that an atom of that element contains, called its number.

To survive, most birds must eat at least half their own weigh food every day.

Don’t talk in class, ________?

There has not been a great response to the sale, ____?

The discovery of the antibiotic penicillin in 1928 has not produced antibiotics useful for treatment of infectious diseases until 1940.

He has made a lot of mistakes in his writing because carelessness.

Both a term paper and final exam is often required for a  class

Some heating devices chemist energy like that found in wood and coal into heat energy.

Lunar eclipses happen only if the Moon is full, but they do not occur a every full Moon

___________in 2001 that the World Trade Center was destroyed.

Nylon, a synthetic done from a combination of water, air and a by product a coal, was introduced in 1938