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Listen to Book 2: The Inside Expedition

All 150 answers from Book 2, read aloud. Press play and keep listening, or tap a question to jump to it. Each title links to its page with the video and the full answer.

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1.Why Do We Forget Why We Walked In?
2.Why Do We Dream?
3.Why Can't We Tickle Ourselves?
4.Why Do We Get Brain Freeze?
5.Why Do We Yawn When Someone Else Yawns?
6.Why Do Songs Get Stuck in Our Head?
7.Why Do We Talk in Our Sleep?
8.Why Does Practice Make Us Better?
9.Why Do We Have Two Sides of the Brain?
10.Why Does the Brain Use So Much Energy?
11.Why Do We Get Dizzy When We Spin?
12.Why Do Smells Bring Back Memories?
13.Why Do We Talk to Ourselves?
14.Why Does the Mind Go Blank on a Test?
15.Why Are Some People Left-Handed?
16.Why Do We Jerk Awake When We Fall Asleep?
17.Why Can't We Remember Being a Baby?
18.Why Do We See Faces in Clouds?
19.Why Do Sudden Sounds Make Us Jump?
20.Why Does Music Give Some People Chills?
21.Why Do We Get Deja Vu?
22.Why Do We Count Without Thinking?
23.Why Does Chewing Help Some People Think?
24.Why Do We Remember the First and Last Things on a List?
25.Why Does Sleep Help Us Remember?
26.Why Do We Blush?
27.Why Do We Cry When We Are Sad?
28.Why Do We Cry When We Are Happy?
29.Why Do We Get Butterflies in the Stomach?
30.Why Do We Laugh?
31.Why Do We Get Angry?
32.Why Do We Feel Scared?
33.Why Do We Feel Jealous?
34.Why Do Hugs Help?
35.Why Do We Feel Lonely?
36.Why Does Worry Feel Like a Tight Chest?
37.Why Do We Giggle When We Are Nervous?
38.Why Do We Hide Our Face When We Are Embarrassed?
39.Why Does Kindness Feel Good?
40.Why Do We Copy Other People's Moods?
41.Why Do We Feel Brave After a Hard Thing?
42.Why Do We Need Friends?
43.Why Does Music Change Our Mood?
44.Why Do We Feel Bored?
45.Why Do We Feel Proud?
46.Why Do We Get Stage Fright?
47.Why Do We Miss People?
48.Why Do We Feel Calm in Nature?
49.Why Do We Sometimes Yawn When We Are Stressed?
50.Why Do Feelings Show on Our Face?
51.Why Do Onions Make Us Cry?
52.Why Does Food Taste Dull When We Have a Cold?
53.Why Do We See in Color?
54.Why Do Our Ears Pop?
55.Why Does Mint Feel Cold?
56.Why Do We Get Used to a Smell?
57.Why Does Spicy Food Feel Like Fire?
58.Why Do We Sneeze?
59.Why Do We Blink?
60.Why Do We Have Two Eyes?
61.Why Do We Have Two Ears?
62.Why Does Sugar Taste Sweet?
63.Why Does Cilantro Taste Soapy to Some People?
64.Why Do We See Spots After a Bright Light?
65.Why Does a Stuffed Nose Change Our Voice?
66.Why Do We Itch?
67.Why Does Darkness Make Hearing Feel Sharper?
68.Why Does Perfume Smell Strong Then Fade?
69.Why Do We Feel Pain?
70.Why Can We Balance?
71.Why Do Sour Foods Make Us Pucker?
72.Why Does Our Own Voice Sound Different?
73.Why Do Eyes Water in the Wind?
74.Why Do We Have Eyebrows?
75.Why Do Some People Need Glasses?
76.Why Do We Grow?
77.Why Do We Lose Baby Teeth?
78.Why Are We a Tiny Bit Taller in the Morning?
79.Why Do We Need Sleep to Grow?
80.Why Do Kids Have So Much Energy?
81.Why Do We Get Hungry So Often?
82.Why Do We Get Growing Pains?
83.Why Do We Outgrow Clothes So Fast?
84.Why Do Babies Have Such Big Heads?
85.Why Do Kids Learn So Fast?
86.Why Do We Have Belly Buttons?
87.Why Do We Look Like Our Parents?
88.Why Do We Have Different Hair Colors?
89.Why Do Some Kids Grow Faster?
90.Why Do Some Kids Need Braces?
91.Why Do We Have Fingerprints?
92.Why Do We Get Freckles?
93.Why Do Hair and Nails Keep Growing?
94.Why Do We Shed Skin?
95.Why Are Some Kids Twins?
96.Why Do People Have Different Skin Colors?
97.Why Do We Get Scars?
98.Why Do Growing Bones Need Calcium?
99.Why Do We Stop Getting Taller?
100.Why Do We Keep Changing as We Grow?
101.Why Do We Live in Families?
102.Why Do We Have Last Names?
103.Why Do People Speak Different Languages?
104.Why Do We Wave Hello?
105.Why Do We Have Rules?
106.Why Do We Go to School?
107.Why Do People Have Different Jobs?
108.Why Do We Use Money?
109.Why Do We Celebrate Birthdays?
110.Why Do People Wear Different Clothes?
111.Why Do We Tell Stories?
112.Why Do We Have Cities?
113.Why Do We Use Maps?
114.Why Do We Help People?
115.Why Do We Have Teams?
116.Why Do We Write?
117.Why Do People Move to New Places?
118.Why Do We Have Holidays?
119.Why Do We Say Please and Thank You?
120.Why Do We Have Addresses?
121.Why Do We Use Clocks?
122.Why Do We Have Libraries?
123.Why Do We Work Together?
124.Why Do Places Have Names?
125.Why Do We Share Food?
126.Why Do We Have Day and Night?
127.Why Do We Have Seasons?
128.Why Does Weather Change?
129.Why Does It Rain?
130.Why Does the Wind Blow?
131.Why Are There Clouds?
132.Why Are Oceans So Big?
133.Why Do Mountains Rise?
134.Why Do Rivers Flow?
135.Why Is Earth Round?
136.Why Do Things Fall Down?
137.Why Does the Moon Change Shape?
138.Why Do Stars Look So Small?
139.Why Is the Sky Blue?
140.Why Are Sunsets Orange and Pink?
141.Why Do Volcanoes Erupt?
142.Why Does the Ground Shake?
143.Why Do We Find Fossils?
144.Why Do Trees Help Us Breathe?
145.Why Do We Recycle?
146.Where Does Trash Go?
147.Why Do We Need World Maps?
148.Why Do Clocks Disagree Around the World?
149.Why Do People Explore?
150.Why Should We Take Care of Earth?

The audio is the sound from each video, so it includes soft background music.

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