A strange triangle of light appears in late winter skies. Here’s what causes it.

In late winter, the zodiacal light is visible in the evening in the Northern Hemisphere (false dusk) and in the pre-dawn ...

Q&A: How the 'science of reading' is reshaping literacy education

Stanford Professor Rebecca Silverman discusses a transformative movement backed by research that is changing literacy ...

Curious Kids: What is the smallest thing in the universe?

Curious Kids is a series for children in which we ask experts to answer questions from kids. What is the smallest thing in the universe that actually exists? – Mimi, 12, Abeokuta, Nigeria To find an ...

Head-scratching optical illusion sparks debate: ‘How do people not see this?’

What do you see? An optical illusion is dividing the internet over whether the picture is of pink slime or three forks laid out on a hot pink dish towel — and it’s making people’s brains hurt. Deemed ...