In this video, I explain and demonstrate the specific torsion test, a special test used in the assessment of lumbar rotational instability. More specifically, we cover the hand placement in detail, the testing procedure, and the...

In this video, I explain and demonstrate the posterior shear test, a special test used in the assessment of lumbar posterior instability. More specifically, we cover the hand placement in detail, the testing procedure, and the...

The Kingdom of Kongo was an indigenous African kingdom in modern Day Angola and the Republic of Kongo. The story of its unstable life and eventual decline show the heavy damage the slave trade had upon this continent.

Almost all vaccines on the market require refrigeration to remain viable, including during transport. Continuous cooling is expensive and especially challenging in developing countries. To solve this problem, Vaxess Technologies Inc., a...

Introducing free radical halogenation of alkanes.

Gideon Rachman, the FT's chief foreign affairs commentator, asks whether the president's unpredictable decision-making on foreign affairs has increased the risk of conflict.