Good science connects a question to measurements and an explanation that can be tested. These thirty-one guides help you plan research, interpret instruments and evaluate evidence, from AI development to nanoscale materials and Earth history. Choose a subject below.
Plan research and evaluate evidence
Basic Research: How Discovery Differs from Product Development
Distinguish basic research, applied research and experimental development, then evaluate scientific progress and claims about future impact.
AI Research and Development in China: Models, Evaluation and Standards
Explore China’s AI research ecosystem, follow model and scientific-AI releases, and evaluate the evidence behind results and standards claims.
Research Design Tools: Turn a Question into a Testable Experiment
Plan controls, experimental units, randomization, replication and blocking, with a verified fictional filter experiment and downloadable research worksheets.
E-Science: Build a Reproducible Research Workflow
Preserve research data, metadata, code, environments, and provenance. Try a verified downloadable project and distinguish reproducibility from validity.
Mobile Data Acquisition: Plan a Reliable Science Field Study
Plan a small field investigation with sensor checks, fair comparisons, time and location records, and an editable field worksheet.
Data Loggers: Plan a Measurement You Can Trust
Choose sensor range, resolution, sampling and storage intervals; handle timestamps, calibration checks, and missing data with a verified temperature example.
Pipetting: Improve Accuracy, Precision, and Repeatability
Choose and verify pipetting methods, investigate transfer problems, and distinguish mean error from repeatability with checked fictional datasets and worksheets.
Automated Liquid Handling: Plan and Verify a Reliable Workflow
Plan liquid classes, plate maps, source volumes, controls and pilot runs before transferring an assay to automated liquid handling.
Protein Crystallization Screening Chips: From Conditions to Useful Hits
Understand microfluidic protein-crystallization screens, sample and chip tradeoffs, apparent hits, follow-up experiments and diffraction checks.
Understand instruments and measurements
Mass Spectrometry: Read the Signal and Understand the Evidence
Understand mass-to-charge ratio, analyzer roles, resolving power, mass error and identification limits, with a checked downloadable ppm example.
Ion Traps in Mass Spectrometry: Follow Isolation and Fragmentation
Follow trap-based MS/MS and MSn measurements, from ion accumulation to precursor selection, fragmentation and acquisition tradeoffs.
X-Ray Fluorescence Imaging: Read an Elemental Map
Interpret X-ray fluorescence maps through spectra, calibration, sample thickness, spatial resolution and a worked count-rate comparison.
X-Ray Detectors: Match the Measurement to the Experiment
Interpret detector efficiency, pixel size, count rate, dynamic range and geometry before planning an X-ray diffraction measurement.
X-Ray Diffraction: What a Pattern Can—and Cannot—Tell You
Read powder X-ray diffraction patterns, check Bragg-law calculations, and understand phase identification, peak widths, and quantitative limits.
How Particle Accelerators Become Scientific Light Sources
Follow electrons, magnets, RF cavities, and beamlines to understand synchrotron X-ray experiments and how light sources differ from colliders and XFELs.
Attosecond Electron Pulses: How Scientists Time Ultrafast Motion
Understand attoseconds, electron pulse trains, the 2018 travelling-wave experiment, and the difference between pulse duration and experimental time resolution.
Explore nanoscale materials and interfaces
Carbon Nanotubes and Light: From Structure to Optical Signals
Connect nanotube structure, optical excitation and electrical injection to the evidence behind a light-emission claim.
DNA Sorting of Carbon Nanotubes: What Purity and Chirality Mean
Understand nanotube mixtures, DNA wrapping and separation, and distinguish enrichment, purity and recovery with a worked example.
Metal Nanoparticles and Light: Understanding Plasmonic Near Fields
Understand localized optical fields, absorption and scattering, and read nanoparticle field maps without confusing a model with a device result.
Nanograss and Wetting: Why Tiny Surface Structures Change Droplets
Interpret contact angle, droplet mobility and wetting transitions on textured surfaces, with a worked hysteresis example.
Shaping Nanocrystals: How Growth Conditions Change Form
Read nanocrystal growth studies by separating shape, scale and population evidence, and practice measuring a micrograph with a scale bar.
From Liquid Threads to Nanofibers: Understanding Drop Breakup
Understand how surrounding-fluid viscosity changes drop breakup, distinguish liquid threads from solid fibers, and read image sequences with consistent scales.
Connect matter, devices and motion
Nano CMOS: How Transistor Scaling Changes Chips
Understand CMOS switching, planar and three-dimensional transistors, power and density tradeoffs, and the evidence behind chip-scaling claims.
Chip Interconnects: What Limits Signal Speed
Understand resistance, capacitance and signal delay, and interpret a nanotube microwave experiment without treating test frequency as processor speed.
Inverse Problems in Quantum Materials: Work Backward from a Desired State
Understand eigenstate-to-Hamiltonian construction, the chosen model space, nonunique solutions and the checks needed before a model becomes a materials proposal.
Particle Packing: Measure Solid Volume and Empty Space
Calculate packing fraction, compare particle shapes fairly, and understand the conditions behind the classic candy-packing experiment.
Quantum Entanglement: What Experiments Show and What It Cannot Do
Understand entanglement, Bell tests, a worked CHSH correlation example, and the limits of quantum communication and security claims.
Short-Radius Centrifuges: How Artificial Gravity Research Works
Understand radius, rotation and head-to-foot loading, then interpret what human centrifuge and bed-rest studies establish about artificial gravity.
Interpret Earth and life history
Australia’s Bedout Impact Claim: What the Extinction Evidence Shows
Examine the Bedout impact hypothesis, the evidence needed to identify a crater, and research connecting Siberian Traps volcanism with the end-Permian extinction.
How to Photograph and Measure Fossils Without Losing Context
Document fossil specimens with scale, orientation, provenance, and uncertainty; verify image measurements and recognize bias in published photographs.
Why Ancient Pigment Extracts Look Pink
Explore the 1.1-billion-year-old pigments from Mauritania and follow the evidence from preserved molecules to ancient marine ecosystems.