Use these operators in the search bar to filter your results precisely.
Our search understands special commands. Type them directly into the search bar to activate advanced filters.
Format: date:YYYY or date:YYYY-MM or date:YYYY-MM-DD or date:YYYY-YYYY
Examples:
CRISPR date:2015-2020COVID vaccine date:2020-03 | date:2020-12 (range between two dates)climate change date:2024exoplanets date:2024-01-01 | date:2024-06-30Date Range Syntax:
date:2020-03 | date:2020-12 (year-month range)date:2020 | date:2023 (year range)date:2020-03-15 | date:2020-12-31 (full date range)Alternative syntax:
published:2023year:2020-2022Format: source:"Institution Name" or institution:"Institution Name"
Examples:
source:MIT artificial intelligenceinstitution:"Johns Hopkins" COVIDsource:NASA Marssource:"Max Planck Institute" quantuminstitution:Stanford medicineTip: Use quotes for multi-word institutions
Format: journal:"Journal Name"
Examples:
journal:Nature gene editingjournal:"The Lancet" clinical trialjournal:Science climatejournal:Cell immunologyFormat: method:"research type"
Examples:
method:"randomized controlled trial" cancermethod:"meta-analysis" dietmethod:"observational study" air pollutionmethod:"experimental study" photosynthesismethod:"computational modeling" protein foldingFormat: subject:"subject type"
Examples:
subject:people depression treatmentsubject:animals behaviorsubject:cells agingsubject:"data analysis" epidemiologyFormat: keyword:"topic" or topic:"category"
Examples:
keyword:immunology T-cellstopic:"machine learning" healthcarekeyword:"climate change" adaptationtopic:exoplanets habitableFormat: doi:10.xxxx/xxxxx
Examples:
doi:10.1038/s41586-023-06825-8doi:10.1126/science.abc1234Format: has:images or has:video or has:multimedia
Examples:
Mars rover has:imagescell division has:videoblack hole has:multimediasource:NASA has:images date:2024Format: "exact phrase in quotes"
Examples:
"long COVID" treatment"mRNA vaccine" development"gravitational waves" detection"CRISPR-Cas9" therapyThis is where it gets powerful. Stack operators to create precise queries:
Examples:
source:MIT topic:"artificial intelligence" date:2023-2024 has:imagesjournal:Nature method:"randomized controlled trial" date:2020 | date:2022 COVIDinstitution:"Johns Hopkins" subject:people vaccine date:2020source:NASA keyword:Mars has:multimedia date:2021 | date:2025journal:"The Lancet" method:"meta-analysis" subject:people cardiovascularCRISPR source:Berkeley journal:Science date:2015-2020climate source:"NOAA" date:2024 has:imagesquantum institution:"MIT" OR institution:"Caltech" date:2023Format: AND, OR, NOT (in capitals)
Examples:
vaccine AND efficacy NOT animalclimate change AND (adaptation OR mitigation)source:MIT OR source:Stanford artificial intelligencecancer treatment NOT chemotherapy(immunotherapy OR CAR-T) AND melanomaFormat: * for wildcard matching
Examples:
neuro* (finds neuroscience, neurology, neuroplasticity, etc.)COVID-* (finds COVID-19, COVID-related, etc.)bio*technology| What You Want | Type This | Example |
|---|---|---|
| Specific institution | source:"Name" | source:"MIT" |
| Date range | date:YYYY | date:YYYY | date:2020 | date:2023 |
| Specific journal | journal:"Name" | journal:Nature |
| Study type | method:"Type" | method:"clinical trial" |
| What was studied | subject:"Type" | subject:people |
| Has media | has:images | has:video |
| Exact phrase | "phrase" | "dark matter" |
| Combine searches | operator operator | source:NASA date:2024 |
| Multiple options | OR | journal:Nature OR journal:Science |
Start simple, then add:
cancercancer date:2024cancer date:2024 method:"clinical trial"cancer date:2024 method:"clinical trial" source:StanfordUse parentheses for complex queries:
(source:MIT OR source:Harvard) AND topic:"quantum computing" AND date:2023-2024Combine text search with operators:
mRNA vaccine development source:"Moderna" OR source:"Pfizer" date:2020Search within search results:
After getting results, refine by adding more operators to your original query.