Why is it so much easier to make a mess of your room than to clean it up? Simply put, it's because there are more messy states than clean states. The law of entropy states that if a system doesn't have any influence from outside forces, it will generally become less organized.
You can see how this makes sense given that there are more states of disorganization than there are of organization. E.g., a broken cup can take many forms but an unbroken cup can only take one. Any arbitrary change in state is therefore more likely to change into something chaotic. You cannot break even (you cannot return to the same energy state, because there is always an increase in disorder; entropy always increases)
The second law has to do with entropy. Entropy is the measure of disorder in a system. A human body is ordered and has low entropy, a puddle of fat, water, carbohydrates, and DNA has high entropy. The Second Law states that the entropy of a system can never decrease. That is, a system can never move from a state of disorder to a state of order without some kind of outside input. That puddle of chemicals will never become a human being unless there's some serious meddling from the outside. And it should be noted that, in the case of life on Earth, something serious is meddling from the outside: The sun.
The sun is increasing in entropy at a massive rate as it pumps energy out into the universe. And the Earth is some prime real estate for collecting that energy. And even though the entropy of a system as a whole must increase, there can be local pockets of decreased entropy. If not, then refrigerators would defy the laws of physics.
• 85% acrylic, 15% wool
• Structured, 6-panel, high-profile
• Plastic snap closure
• Grey under visor
• Head circumference: 22″–24″ (55–60 cm)
• Blank product sourced from China
Size guide
| A | B | C | D | |
| One size (inches) | 20 ½-24 ¼ | 4 ½ | 2 ⅝ | 7 ⅛ |
| A | B | C | D | |
| One size (cm) | 52-61.5 | 11.5 | 6.7 | 18 |