Who Invented the First Fast Food Restaurant?

ARTS & CULTURE

148 Comments

#1319

What Is Obsidian?

SCIENCE

54 Comments

#1318

Are Ghosts Real?

ARTS & CULTURE

728 Comments

#1317

How Are Pickles Made?

ARTS & CULTURE

52 Comments

#1316

What Is in Toothpaste?

SCIENCE

66 Comments

#1315

Who Invented Pizza?

ARTS & CULTURE

204 Comments

#1314

Can Porcupines Shoot Their Quills?

SCIENCE

68 Comments

#1313

Who Invented the Paper Plate?

TECHNOLOGY

24 Comments

#1312

How Does a Round Camera Lens Produce a Rectangular Picture?

TECHNOLOGY

26 Comments

#1311

Why Aren’t Seat Belts Required on School Buses?

TECHNOLOGY

144 Comments

#1310

How Do People Who Are Blind Use Computers and Other Technology?

TECHNOLOGY

54 Comments

#1309

What Determines the Color of Your Eyes?

SCIENCE

123 Comments

#1308