The only nearly inexhaustible sources of water—the essence of life on Earth—are the seas and oceans, which, however, are of high salinity.
On 1 November, when Mexicans celebrate their holiday “the Day of the Dead”, some celebrate the millions of orange-and-black monarch flight to the mountainous fir forests of central Mexico.
Being as vast as it is, Earth has quite a diverse geography. Each part is endowed with certain attributes; some are mountainous, others are hilly, some are cold while others are hot; some are wet, others are dry.
In the past two decades, the Green-Chemistry Movement has helped industry to become much cleaner and more sustainable.
The oceans, covering some 71% of the Earth’s surface, are the foundation of human life. They have always been a prime source of nourishment for the life it helped generate and served as well for trade and commerce.
Like good nutrition and exercise, adequate sleep is part of a healthy lifestyle. Sleep deprivation is an unrecognized cause of many problems.
Investing 30 minutes a day in aerobic exercise such as walking, jogging, running, bicycling, or swimming can help you live healthier and longer.
Autism is a general term for a group of complex disorders of brain development. These disorders are characterized, in varying degrees, by difficulties in social interaction, verbal and nonverbal communication, and repetitive behaviors.