Like hands, feet are constructed of many small bones with the main segments called the tarsals, metatarsals and phalanges. The tarsals and metatarsals are responsible for forming the arch in the foot. The arch acts as a lever and helps give humans strength for walking. Phalanges, or toes,...
God, my dear student, why CANNOT you see that this matter is a real, real matter, often a matter of the very being, for the person, for the historical men and women you are looking at — or are supposed to be looking at!”
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Stone tools, animal bones and an incised mammoth tusk found in Russia’s frigid far north have provided what archaeologists say is the first evidence that modern humans or Neanderthals lived in the Arctic more than 30,000 years ago, at least 15,000 years earlier than previously thought. A te...
For generations of Americans who grew up encouraged to drink milk to maintain strong bones, the reports raised troubling questions: Is calcium not so important after all?! Are the supplements unsafe? And how much is too much? “It's gotten very confusing but it doesn't need to be,” says...
Your body has tendons from head to toe. But what are tendons made of, and how do they work? Here’s all you need to know about tendons. What Are Tendons? A tendon is a flexible, cord or rope-like connective tissue. It forms a bridge that connects your muscles to your bones. Tendon...
In very dry areas, such as Zimbabwe, sand dams are used to increase the amount of water that can be stored, meaning that farmers can grow more crops and people can have enough drinking water; Landscape restoration Excessive logging (过度砍伐) in Alwar, India, has caused extremely serious dro...
740.Albert Einstein, who is perhaps the greatest scientist in modern physics, is often considered one of the smartest men who ever lived. 阿尔伯特·爱因斯坦——这位或许是现代物理学领域最伟大的科学家——被公认是有史以来...
A tardigrade's body is made up of only 1,000 cells. In comparison, the human body has many trillions of cells. What do tardigrades look like? If you look under a microscope into the tardigrade's tiny body, you won't find any bones. Instead, tardigrades have a fluid-filled compartment...
Bone tissue is a type of connective tissue that's used in forming bones. There are two types of bone tissue: cortical bone and...