What is peak flow measurement? Peak flow measurement is a quick test to measure air flow out of the lungs. The measurement is also called the peak expiratory flow rate (PEFR) or the peak expiratory ...

PM Images / Getty Images The cash flow statement is one of the most important but often overlooked components of a firm’s financial statements. It shows analysts, investors, credit providers ...

Scientists have found evidence that the Lake Tanganyikan cichlids Neolamprologus brichardi and N. pulcher are actually one and the same species. In a paper published in the most recent issue of the ...

Dr Alex Jordan, of the University of New South Wales, Australia, takes a look at the interesting social life of the Tanganyikan cichlid Neolamprologus pulcher. Neolamprologus pulcher is endemic to ...

Latvia's Gints Zilbalodis accomplishes just that. There’s a moment near the end of Latvian animation director Gints Zilbalodis’ “Flow” that powerfully tugs at the heartstrings. It’s when ...

The World Wildlife Fund is a nonprofit known for its international conservation campaigns, from safeguarding huge swaths of the Amazon to rehabilitating the wild tiger population worldwide. But the ...