Mole Day special: counting atoms by weighing them
Mole Day falls on 23 October, a nod to 6.02 × 10²³. A one-hour live session on what a mole is, why chemists need it, and how to use molar mass, with worked problems and time for questions.
Events · Online and in person
Live explainers, lab demonstrations, study sessions and questions for working scientists. Plus a calendar of the science days celebrated around the world.
Mole Day falls on 23 October, a nod to 6.02 × 10²³. A one-hour live session on what a mole is, why chemists need it, and how to use molar mass, with worked problems and time for questions.
01 · Upcoming
Showing 6 of 6 events
A 45-minute walk through active sites, substrates and what slows enzymes down.
Watch and try: preparing accurate solutions from a stock.
Bring your questions; we solve exam-style problems together.
Ask a working researcher about their day, their lab and their path.
How position predicts behaviour, with live examples.
A classic kitchen-table experiment, explained step by step.
02 · Science calendar
Held on the same date every year, listed from the next one coming up. Each links to something on the site that goes with it.
Mole Day
Celebrated from 6:02 a.m. to 6:02 p.m., after 6.02 × 10²³.
World Science Day for Peace and Development
A UNESCO day on science in society.
International Day of Women and Girls in Science
A UN day for equal access to science careers.
Darwin Day
Marking Charles Darwin's birthday and the idea of evolution.
World Water Day
Attention on fresh water, the solvent of life.
Earth Day
Action for the planet, from air to oceans.
DNA Day
Remembering the 1953 double helix papers.
International Day for Biological Diversity
The variety of life and why it matters.
World Environment Day
A UN day for protecting the environment.
World Oceans Day
Celebrating the seas that cover most of the planet.
Scientists, teachers and lab staff: propose a live explainer, demo or Q&A and we will help you run it.