1. Blood is blue inside your body.
Human blood is the same color inside your body as it is outside: red. Our veins look blue because the tissue covering them changes the way light is absorbed and scattered, which affects our perception of their color.
2. Paul Revere shouted “The British are coming!”
You can thank Henry Weds-worth Longfellow and his poem “Paul Revere’s Ride” for spreading that tale. No one knows what, if anything. Revere shouted through the streets of Lexington, Massachusetts, though we don know he told one guard that “the regulars are coming out.”
3. The hottest part of a chill pepper is the seeds
Capsaicia, a chemical compound that binds to the pain receptors on our nerves to produce that very heat, is most concennrated in the inner white rib of the chili pepper. The seeds don’t actually contain any capsaicin, but they may be coated in it because they touch the rib.
4. Jesus Christ was born on December 25.
The Gospels of Matthew and Luke never mention the date of Jesus’s birth. So why do we celebrate December 25 as the day that Christ was born? It could be because of a Roman Catholic historian from the third century, Sextus Julios Africanus, who believed Jesus was conceived on March 25 - nine months before what is now Christmas Day.
5. The Sahara is the world’s largest desert.
Technically, Antarctica is. The U. S. Geological Survey defines a desert as “arid land with meager rainfall [usually less than ten inches per year] that supports only sparse vegetation and a limited population of people and animals.” Antarctica averages only six inches of rain a year (mostly as snow) and is almost 5.5 million square miles. The Sahara is only 3.3 million square miles.
6. Chameleorts can change their coloring to match any background.
The lizards do adjust their skin tone to camouflage themselves in certain environments, but their color range is limited. The really vibrant hues you see on TV and in books aren’t usually meant for tricking predators. Those chameleons are trying to attract a mate or defend their territory. Male chameleons have even been known to change their colors to appear female, which helps them sneak by other males without the threat or fight.
【小题1】It is _________ that essentially make(s) the pepper taste spicy.| A．the concentration of capsaicin | B．the coating of the seeds |
| C．the pain receptors on our nerves | D．the size of the inner rib |
| A．The Sahara isn’t seen as the world’s largest desert because it receives less rain than Antarctica. |
| B．Chameleons change their coloring to serve purposes other than fooling their enemies. |
| C．Wads-worth witnessed Paul Revere shout “The British are coming” with his own eyes. |
| D．The absorption of light by the tissue changes the blood inside our body from red into blue. |
| A．Discoveries That Are Amazing | B．Facts That Are Misleading |
| C．Findings That Are Significant | D．Myths That Are Unknown |
