STEM in the Nation's Capital

Profiles, interviews, and features on the science shaping D.C. — reported, edited, and designed by the students at the front of the room.

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Featured Stories

Latest from The Catalyst.

Exploring groundbreaking research and the brilliant minds driving innovation in D.C. and beyond.

The Archive

Latest stories.

Explore profiles, features, and interviews from our contributors.

Challenge Yourself

The Catalyst Riddle.

A new riddle of language and meaning — only the sharpest minds will unlock the Winners' Lounge.

New Puzzle · Issue No. 02

Can you solve The Catalyst Riddle?

A four-line verse hides a single, ordinary answer in plain sight. Read carefully — the words themselves are the clue.

I am the beginning of eternity,
the end of time and space,
the beginning of every end,
and the end of every place.

What am I?

Accept the Challenge