This site uses cookies. By continuing to use this site you agree to our use of cookies. To find out more, see our Privacy and Cookies policy.
Skip to the content

Share this

Free weekly newswire

Sign up to receive all our latest news direct to your inbox.

Physics on film

100 Second Science Your scientific questions answered simply by specialists in less than 100 seconds.

Watch now

Bright Recruits

At all stages of your career – whether you're an undergraduate, graduate, researcher or industry professional – can help find the job for you.

Find your perfect job

Physics connect

Are you looking for a supplier? Physics Connect lists thousands of scientific companies, businesses, non-profit organizations, institutions and experts worldwide.

Start your search today


Anniversary issue inspires debate

Photo of John Preskill

John Preskill at Caltech comparing his group’s choices with ours for the top discoveries of the last 25 years and the biggest unanswered questions. (Courtesy: IQI, Caltech)

By Louise Mayor

Unless you’ve been living under a stone or aren’t a regular reader, you’ll know that this month marked the 25th anniversary of Physics World – the member magazine of the Institute of Physics (IOP).

We pushed the boat out by turning our October issue into a celebration of all things physics – past, present and future – by picking our top five discoveries in fundamental physics over the last 25 years, the top five images during that period, the five biggest unanswered questions, the top five people changing how physics is done, as well as the top five spin-offs from physics that will improve people’s lives over the next quarter century.

Apart from the special 25th-anniversary issue being the top story on the BBC website for a glorious few hours early in October, we were particularly pleased to see that our pick of the top breakthroughs in fundamental physics inspired a fascinating discussion at John Preskill’s group meeting over at Caltech’s Institute for Quantum Information and Matter.

Preskill challenged his group members to guess what we chose for two of our categories: the top five discoveries over the last 25 years, and the five biggest unanswered questions. His group guessed several choices for each category, and we were delighted to see that their guesses included all of our choices!

The group’s guesses can be seen in the photo above showing Preskill himself, with the Physics World team’s choices marked with red crosses.

(In case you can’t make out his writing, our top five discoveries were neutrino mass, the accelerating expansion of the universe, the Higgs boson, Bose–Einstein condensation and quantum teleportation, while the top five unanswered questions related to the nature of time, life elsewhere in the universe, quantum gravity, quantum weirdness and the dark universe.)

Our choices were first brought to Preskill’s attention a few months ago when we invited him to write about one of our five unanswered questions – he tackled the issue of “Can we exploit the weirdness of quantum mechanics?” and you can read his thoughts on the matter here.

If you’re a teacher or lecturer in physics, why not try out Preskill’s exercise on your students? Let us know how you get on.

And don’t forget, if you haven’t tried them yet, why not have a go at our five fiendish physics puzzles created with GCHQ.

Finally – and I promise this will be the last time we mention it – the special 25th-anniversary issue of Physics World is available in print, online and via our apps (from the App Store and Google Play) to all members of the IOP, but to share it more widely, anyone – members and non-members alike – can download a free PDF of the entire issue. (Remember that to get Physics World each month, you can join the IOP quickly and easily online with IOPimembership costing just £15, €20 or $25 a year.)

This entry was posted in General and tagged , . Bookmark the permalink.
View all posts by this author  | View this author's profile


  1. Harry Schif

    As a very old physicist and now an Affiliate member of IOP, I’m happy to receive your informative newsletter – but I’m also hearing handicapped, I have severe hearing loss. So videos without captions have little value to me. Would it be possible to provide these in the videos you present? I understand that financing would be a consideration.
    Thank you,
    Harry Schiff

  2. Matin Durrani

    Hi Harry
    We’re looking into the possibility of captioning or sub-titling. Unfortunately, as you point out, it costs money — and also time — to do properly.
    Matin Durrani
    Editor, Physics World


  • Comments should be relevant to the article and not be used to promote your own work, products or services.
  • Please keep your comments brief (we recommend a maximum of 250 words).
  • We reserve the right to remove excessively long, inappropriate or offensive entries.

Show/hide formatting guidelines

Tag Description Example Output
<a> Hyperlink <a href="">google</a> google
<abbr> Abbreviation <abbr title="World Health Organisation" >WHO</abbr> WHO
<acronym> Acronym <acronym title="as soon as possible">ASAP</acronym> ASAP
<b> Bold <b>Some text</b> Some text
<blockquote> Quoted from another source <blockquote cite="">IOP</blockquote>
<cite> Cite <cite>Diagram 1</cite> Diagram 1
<del> Deleted text From this line<del datetime="2012-12-17"> this text was deleted</del> From this line this text was deleted
<em> Emphasized text In this line<em> this text was emphasised</em> In this line this text was emphasised
<i> Italic <i>Some text</i> Some text
<q> Quotation WWF goal is to build a future <q cite="">
where people live in harmony with nature and animals</q>
WWF goal is to build a future
where people live in harmony with nature and animals
<strike> Strike text <strike>Some text</strike> Some text
<strong> Stronger emphasis of text <strong>Some text</strong> Some text