Entropy Arrow
为什么打碎的杯子不会自己复原？
Case 1
Diffusion Lab 扩散实验室
Anchor: ink in water, perfume in a room 日常锚点：墨水入水、香水弥散
Particles: 粒子数：
Try 10 particles, then 1000. Watch the probability of spontaneous return drop to zero. 先试10个粒子，再试1000个。看"自发复原"的概率怎样趋近于零。
Case 2
Broken Cup Vote 碎杯投票
Anchor: egg cracking, ice melting 日常锚点：鸡蛋打碎、冰块融化
Which is forward? 哪个是正放？
Few particles: hard to tell. Many particles: obvious direction. Your "time sense" is sensing entropy. 粒子少时分不清，粒子多时一眼可辨。你的"时间感"本质上在感知熵增。
Case 3
Life Irreversibility Gallery 生活不可逆图鉴
Anchor: coffee cools, hair grays, files vanish, stars die 日常锚点：咖啡凉了、头发白了、文件删了、星辰熄灭
Drag every card onto the spectrum. When you're done, hit "Reveal" to see entropy at work in everything. 把每张卡拖到光谱上。全部放好后点"揭示"，看熵增如何渗透一切。