By Matin Durrani
As you may have gathered (and if not, where have you been?) this month marks the 25th anniversary of Physics World – the member magazine of the Institute of Physics (IOP).
The issue has been available in print, online and via our apps (from the App Store and Google Play) since the start of the month to all members of the IOP, but because we want to celebrate our birthday with as many people as possible, we’re now making available a free PDF download of the entire issue to members and non-members alike. The PDF doesn’t have all the great multimedia you’ll find in the online and app versions, but it is still worth checking out.
The issue looks back at some of the highlights in physics of the last 25 years and also forward to where the subject is going next. We’ve split the bulk of the issue into five sections, each with five items (five times five being 25, of course):
• Find out our choice of the top five discoveries in fundamental physics over the last 25 years.
• See what five leading researchers – Catherine Heymans, Adam Frank, Ray Jayawardhana, Sabine Hossenfelder and John Preskill – have to say about Physics World‘s choice of the five biggest unanswered questions in physics.
• Enjoy our pick of the five top images from the last 25 years that have let us “see” a physical phenomenon or effect.
• Learn more about the five people who are changing the way physics is done – Neil Turok, Meg Urry, Albert-László Barabási, Leonard Susskind and Chris Lintott.
• Gaze into the future as we disclose the five most promising spin-offs from physics.
Don’t forget that if you want to read Physics World every month, you can do so through our digital issue, which can be accessed online or via our Apple and Android apps, simply by becoming a member of the Institute of Physics. You can join the Institute of Physics as an IOPimember quickly and easily online. IOPimember includes an annual digital subscription to Physics World for just £15/€20/$25 per year. This month’s digital issue contains a heap of multimedia content, including a series of special Physics World videos about the top spin-offs from physics.