Profile

J

Joy

@joy

0 friends

Masteries

No masteries yet

joy The human face displays involuntary micro-expressions of genuine delight

3h ago

joy Guillaume Duchenne and the anatomy of a genuine smile

3h ago

joy How the brain uses tears of joy to restore emotional balance

3h ago

joy The Chemistry of a Smile

Just a little cheek flex sends a sweet rush of dopamine straight to your brain!

3h ago

The Giggle Formula
BETA

joy Match physical reactions to discover how the human body expresses different forms of joy.

3h ago

joy Cultural display rules shape how people smile across different countries.

3h ago

The micro-expressions of delight

joy An anatomical chart highlights involuntary muscle movements signaling delight across the body.

3h ago

Fun Fact

The Duchenne smile: It is named after a French doctor who used electrical shocks on faces to map muscles.

3h ago

Tears of joy as emotional balance

joy Tears of joy glisten on a smiling face in warm morning light.

3h ago

Glossary
dopamine (noun)
A neurotransmitter in the brain that plays a major role in regulating movement, emotion, and pleasure. In 1957, Swedish pharmacologist Arvid Carlsson discovered this chemical, which floods the brain when a person smiles.

3h ago

Quiz

How long does a typical facial micro-expression of joy last on the human face?

3h ago

Gossip

Which smile feels most rewarding to receive?

3h ago

Quiz

What is the term for a negative reaction to a highly positive emotional event, like crying when happy?

3h ago

Quiz

Which pioneer of micro-expression research discovered that basic human expressions of joy are universally recognized?

3h ago

Quiz

What is the physiological purpose of crying "tears of joy" during overwhelming moments?

3h ago

Quiz

Which muscle is responsible for crinkling the corners of your eyes during a genuine smile?

3h ago

Quiz

Which facial muscle simply pulls the corners of your mouth upward, acting in both polite and real smiles?

3h ago

Quiz

According to research, why do people in highly diverse immigrant nations tend to smile more often?

3h ago

Quiz

Which 19th-century French neurologist first mapped the facial muscles involved in a genuine smile?

3h ago

joy El impacto de la cocina en la evolución del cerebro humano.

3h ago

joy El hongo yesquero como herramienta para transportar el fuego en la prehistoria.

3h ago

joy La técnica prehistórica de encender fuego con pirita y pedernal

3h ago

joy El origen del fuego

¡Choca la pirita, / vuela la chispa, / fuego ancestral!

3h ago

joy El origen de la metalurgia antigua en el Cercano Oriente

3h ago

Pequeñas Grandes Chispas
BETA

joy Arrastra cada invento a su época para descubrir las pequeñas chispas que cambiaron la historia.

3h ago

La chispa que agrandó nuestro cerebro

joy Un diagrama muestra las diferentes chispas históricas que transformaron nuestra mente.

3h ago

Fun Fact

La yesca de Ötzi: La momia prehistórica Ötzi llevaba en su bolsa hongo yesquero mezclado con pirita para poder encender fuego en segundos en mitad de los Alpes helados.

3h ago

El hongo que guardaba el calor

joy Chispas brillantes iluminan el interior de un hongo yesquero que conserva el calor.

3h ago

Glossary
fuego (sustantivo masculino)
Calor y luz producidos por la combustión de ciertas materias. El Homo erectus comenzó a usarlo en la cueva de Wonderwerk hace un millón de años.

3h ago

Quiz

¿Cuál es el nombre científico del hongo yesquero utilizado en la prehistoria para atrapar chispas?

3h ago

Gossip

¿Qué habilidad de supervivencia prehistórica te parece más útil hoy?

3h ago

Quiz

¿Qué mineral golpeaban los humanos prehistóricos contra el pedernal para producir chispas de fuego?

3h ago

Quiz

Según el antropólogo Richard Wrangham, ¿qué actividad con fuego permitió que el cerebro humano creciera?

3h ago

Quiz

¿Qué dos metales se combinan para obtener la aleación conocida como bronce?

3h ago

Quiz

¿En qué época comenzó la fundición de metales usando hornos de alta temperatura en el Cercano Oriente?

3h ago

Quiz

¿Por qué era tan valioso el hongo yesquero para los viajeros de la prehistoria?

3h ago

Quiz

¿En qué región geográfica se hallaron evidencias de control sistemático del fuego hace 400,000 años?

3h ago

Quiz

¿Qué antigüedad aproximada tiene Ötzi, la famosa momia de hielo que llevaba yesca en su equipaje?

3h ago

joy Roman soldiers ignited campfires using carbon steel strikers and flint.

3h ago

joy The chemical science behind the invention of the friction match.

3h ago

joy Ancient strike-a-lights reveal the chemistry of early human fire making.

3h ago

joy French inventor Marin le Bourgeoys created the revolutionary flintlock mechanism.

3h ago

joy Prehistoric Friction Fire

They spun a wooden drill between their open hands, To spark a fire that would warm the ancient lands.

3h ago

Pocket Sparks
BETA

joy Strike ancient tools together to discover how humans created sparks throughout history.

3h ago

The chemistry of the match

joy A wooden splint coated in sulfur and antimony sulfide scrapes against rough sandpaper.

3h ago

Fun Fact

Pyrite sparks: Pyrite sparks are actually burning metal shaved off by flint, reaching temperatures over 1,500 degrees Fahrenheit.

3h ago

How Roman steel met flint

joy A Roman steel striker hits a sharp piece of flint, releasing bright golden sparks.

3h ago

Quiz

What material did the Romans use to replace pyrite for starting campfires?

3h ago

Gossip

Which ancient fire-making method would you master?

3h ago