"Empathy is more powerful than hate, and our lives should be dedicated to making it go viral."

We loved this powerful story of an American boy trained to hate who chose a peaceful path instead. He tells his story in “The Terrorist’s Son,” a new TED Book, coming out this fall. We’re excited to share it with you! 

5 fun facts about fireflies (aka your favorite summer bug):

Fireflies mate for a full evening and spend the whole night together. Awwww.

The lights you see from fireflies are courtship signals that males are sending to females.

But firefly romance is risky business. “Femme fatale” fireflies seduce males, and then suck their blood to get chemicals for their own survival.

Around 150 million years ago, the very first fireflies flew during the daytime and didn’t light up. Today, there are still some firefly species where only the females light up.

The chemical that makes fireflies light up first evolved as a warning sign to ward off predators — and it tastes terrible. Don’t eat the fireflies, folks. 

WATCH: The loves and lies of fireflies » 

Energy moves in and out of Earth's physical systems, and during any energy transfer between them, some energy is lost to the surroundings, as heat, light, sound, vibration, or movement. Our planet's energy comes from internal and external sources. Geothermal energy from radioactive isotopes and rotational energy from the spinning of the Earth are internal sources of energy... ...while the Sun is the major external source, driving certain systems, like our weather and our climate. Sunlight warms the surface and atmosphere in varying amounts, and this causes convection, producing winds and influencing ocean currents. Infrared radiation, radiating out from the warmed surface of the Earth, gets trapped by greenhouse gases and further affects the energy flow.

teded:

A Guide to the Energy of the Earth

Energy moves in and out of Earth’s physical systems, and during any energy transfer between them, some energy is lost to the surroundings as heat, light, sound, vibration, or movement.

Our planet’s energy comes from internal and external sources. Geothermal energy from radioactive isotopes and rotational energy from the spinning of the Earth are internal sources of energy, while the Sun is the major external source, driving certain systems, like our weather and our climate.

Sunlight warms the surface and atmosphere in varying amounts, and this causes convection, producing winds and influencing ocean currents. Infrared radiation, radiating out from the warmed surface of the Earth, gets trapped by greenhouse gases and further affects the energy flow.

From the TED-Ed Lesson A guide to the energy of the Earth - Joshua M. Sneideman

Animation by Marc Christoforidis

Recognize these folks? They’re famous tech titans, including Bill Gates and Steve Jobs, way back in the day.

These unusually intimate photos were taken by Doug Menuez (Fearless genius — the digital revolution in Silicon Valley), who was his late 20s during the tech explosion of the 80s.

Doug was obsessed with this world, so he did a crazy thing: He went up to Steve Jobs — then being forced out of Apple — and asked if he could photograph him as he built his new platform. Surprisingly, Jobs said yes. 

See more of his throwback snapshots »

For seven days, designer Cristina Vanko wrote every single one of her text messages in calligraphy. The project started as a way to force herself to master calligraphy, but soon changed the way she looked at communicating with the people in her life. Think you could do it too? 

Watch her TEDxUofChicago talk on the project here»