Follow your curiosity

What discovery has been shared with you?

FACTREE gives you something interesting to discover every day — and something worth talking about together.

Start with one fact. Explore it, go deeper, then follow whichever branch catches your imagination.

Choose subjects for a surprise

Exploring any topic

Begin your discovery

Your next discovery is one click away.

Choose one or more subjects above, or leave Any Topic selected and let curiosity decide.

Chemistry

The Principle of Mass Spectrometry for Molecular Identification

Quick fact

Mass spectrometry can detect molecules with a precision of less than one atomic mass unit (amu), distinguishing between molecules that differ by a single neutron.

Why this is interesting

Ever wonder how scientists can identify a single molecule among billions of others in a complex sample? Mass spectrometry allows them to 'weigh' individual molecules with incredible precision.