What are the Earth's oldest living things?

The White Mountains of California are home to our oldest living things – trees! The oldest tree in the world, Methuselah, has roots that go back over 4,600 years. This makes it older even than the Great Pyramids. The 26-foots bristlecone pine tree is the oldest of many that have outlived civilization after civilization

What man-made things on Earth can be seen from space?

' When humans first flew in space, they were amazed to discover that the only man-made object visible from orbit was the Great Wall of China'. Although this is a nice idea, it's not true. The Great Wall is mostly grey stone in a grey landscape and, in fact, is very difficult to see even from a plane flying at mere 15 kilometers above. What can be seen when orbiting the Earth (from about 200 kilometers up) are the lights of the world's large metropolitan areas.

Why isn't there a row 13 on aeroplanes?

In many countries, the number 13 is considered to be very unlucky. In France, there is never a house with the number 13. In the United States, modern high-rise buildings label the floor that follows 12 as 14. Where did this fear of a number come from? The idea goes back at least to Norse mythology in ancient times. There was a banquet with 12 gods. Loki, the spirit of evil, decided to join without being invited. In the fight that followed, Balder, the favorite of the gods, was killed. In Christianity, this theme was repeated at the Last Supper. Jesus Christ and his apostles numbered 13 people at the table.

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Centuries ago,people did not have much free time, because everybody was working too hard. In Britain in the nineteenth century, people had more spare time, but because the Victorians hated relaxing and doing nothing, they invented football, rugby and cricket. People took up more gentle activities too, like gardening, bird-watching and train spotting, and it was even possible simply to watch a sport and give the impression that you were actually doing something. Gradually, leisure activities have become less and less energetic interests and hobbies. But now there is a new type of person who thinks that lying on the sofa watching television on Sunday afternoon or reading the newspaper from cover to cover is the most exciting activity they can

manage. This twentieth century couch potato who has a sedentary lifestyle with no or irregular physical activity. It is commonly found in both the developed and developing world. Sedentary activities include sittingreading, watching television, playing video games, and computer use for much of the day with little or no vigorous physical exercise. A sedentary lifestyle can contribute to many preventable causes of death. Screen time is the amount of time a person spends watching a screen such as a television, computer monitor, or mobile device. Excessive screen time is linked to negative health consequences. For them, every activity is too much trouble, and laziness is an art form! So how do you spend your free time?Are you a coach potato?