What is below Earth, since space is present in every direction?

Which way is ‘down’ has a different answer depending on where you are on Earth, in the solar system, in our galaxy and beyond ...
IEEE

Fabrication of a Large Aperture angle, Lens Less Line Focus Ultrasonic Transducer & Validation with Standard Materials

Abstract: The main goal of this study is to characterize isotropic materials by determining the metal's elastic constants such as Modulus of Elasticity, Shear Modulus, and Poisson's Ratio using a ...
The Motley Fool

Precious Metals Plays: GDX Offers Broader Exposure and Less Volatility Than SLVP

Its beta of 0.87 is also notable. Beta measures a stock's volatility relative to the market, usually using the S&P 500 as a benchmark. GDX's beta under 1 means the ETF is less volatile than the ...
The Motley Fool

3 Absurdly Cheap Stocks You Can Buy For Less than $100 Right Now

These top healthcare companies all have strong underlying businesses. Their low valuations can make them attractive for bargain hunters. They also all pay dividends at a higher rate than the S&P 500 ...