A Undersea View of Our Earth's Geography

The ocean bottom is divided into three major areas: the continental shelf, the continental slope, and the deep ocean basin. The continental shelf extends underwater from each of the major land masses and can best be characterized as the submerged portion of the continents. The shelf has features similar to those we see on land, including hills, ...

Medicine

What's So Bad About Cholesterol?

Cholesterol has a worse reputation than it deserves. This waxy lipid (a kind of fat) is essential to good health. It builds the membranes that hold cells together. It's used in making certain hormones ... Continue reading

Biology

Lionfish Invasion

Lionfish (Pterois volitans/miles complex) are beautiful, yet venomous, coral reef fish from Indian and western Pacific oceans that have invaded East Coast waters. Ironically, this species of lionfish ... Continue reading

Science

Serendipity In Science

Most scientists accept the notion that serendipity plays a major role in their work. Too many discoveries have been, after all, the result of 'lucky accidents.' In the 16th century, for example, ... Continue reading

Biology

Left Nostril Right Brain

A recent experiment performed by researchers at Philadelphia's Monell Chemical Senses Center, probably the world's pre-eminent institution devoted to the study of smell, showed that the world smells ... Continue reading

How Fast is Mach 1?

by Anton Skorucak, MS

Mach1 A Mach number is a common ratio unit of speed when one is talking about aircrafts. By definition, the Mach number is a ratio of the speed of a body (aircraft) to the speed of sound in the undisturbed medium through which the body is traveling.

It is said that the aircraft is flying at Mach 1 if its speed is equal to the speed of sound in air (which is 332 m/s or 1195 km/hr or 717 miles/hour.) An aircraft flying at Mach 2 is flying at twice the speed of sound in air, etc. Mach numbers are named after Ernst Mach (1838-1916), an Austrian philosopher and physicist. The term Mach number came into use in 1929.

A Undersea View of Our Earth's Geography

What's So Bad About Cholesterol?

Lionfish Invasion

Serendipity In Science

Left Nostril Right Brain

How Fast is Mach 1?

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