Utah’s hottest new power source is 15,000 ft. below the ground

American aid protects kids from HIV. If we cut it, more of them will die.

"Are we going to lose lives to malaria again?"

Cutting PEPFAR would put at 600,000 lives at risk in South Africa alone

The devastating impact of cutting America's anti-TB efforts

Scientists have created a revolutionary mosquito that is incapable of transmitting malaria

America’s malaria

Wiggling is welcome in this kindergarten classroom

This heroic nurse climbs 1000-foot ladders to save lives

Life with TB: "You may find that even the wife is trying to run from you."

The global health success story no one talks about

"We are praying that there is someone out there who can hear our cry"

TB, John Green, and me

Aid cuts are putting Wendo Sahar's lifesaving work in jeopardy

Wendo Sahar wants to fight HIV in her home country. Aid cuts are making that harder.

Cutting America's support for vaccines is a bad idea

Cutting PEPFAR will cost millions of lives

It's a mistake to cut polio funding

Agnes Nambozo literally climbs mountains to vaccinate children

This chart STILL blows my mind

Cutting America's health aid is a huge mistake

The next phase of the Alzheimer’s fight is here

The heat is on with geothermal energy

Better Cows, Better Grades | Partners of Human Potential

Mother’s Touch, Scientific Breakthrough | Partners of Human Potential

Greater Things | Partners of Human Potential​​

The future of first breaths

My new deadline: 20 years to give away virtually all my wealth

The origin story of Microsoft

The library where I learned to love reading

The rise and fall of meat consumption

The surprising math of feeding the world

Before Microsoft, there was a boy called Trey

Tales of a fourth grade clown | Stories from Source Code

My favorite Christmas memories | Stories from Source Code

The books that made me | Stories from Source Code

A visit back to Harvard | Stories from Source Code

The pizza that fueled my college years | Stories from Source Code

Going back to my college dorm | Stories from Source Code

My grandma, the card master | Stories from Source Code

My first video game | Stories from Source Code

Hiking in the mountains | Stories from Source Code

Fun at the World's Fair| Stories from Source Code

Programming while hiking up a mountain | Stories from Source Code

My friendship with Paul Allen | Stories from Source Code

Remembering my best friend | Stories from Source Code

Sneaking out to go to work | Stories from Source Code

My first job in software | Stories from Source Code

My new memoir Source Code is out soon

The time I brought a cow lung to class | Stories from Source Code

No ketchup bottles on the table | Stories from Source Code

The first time I used a computer | Stories from Source Code

The real Bill Gates | Stories from Source Code

My mom's influence on my social skills | Stories from Source Code

Growing up with two sisters | Stories from Source Code

The report card matrix | Stories from Source Code

Playing ball on the PDP-10 | Stories from Source Code

Taking the ferry to visit my grandparents | Stories from Source Code

From Cub Scout to Boy Scout | Stories from Source Code

My 177-page report on Delaware | Stories from Source Code