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FROM OUR LATEST ISSUE, JUNE 2015• America’s Next Spyplane — The SR-72 will travel at six times the speed of sound (twice the speed of its predecessor). Traveling at such extremes means it will need weapons designed specifically for the task. • Long Live the Mammoth — De-extinction might not happen exactly the way it does in Jurassic Park, but using a starkly similar process, bringing the mammoth—or at least mammothlike creatures—back could very well be possible. • The New Faces of Energy — Entrepreneurs and startups are working to change the way we use and produce energy with molten salt reactors, tiny turbines, and a method for turning plastic into fuel—to name a few. • The Cure-All — Stem cells are being marketed as a cure to chronic pain. But is the unregulated, unproven treatment too good to be true? Our writer goes under the knife to find out. • Now — A smart grill that talks back, sensors to sniff out what’s in the air, the weird world of mobile payments, and more!• Next — The safety of self-driving cars, the ups and downs of everyone’s favorite drug, a robot built for disasters, and more!• Manual — How to build a DIY particle detector, a real-life tricorder inspired by science fiction, absurd machines that do silly tasks, and more! SUBSCRIPTIONS AVAILABLE:• 1-year (12 issues) subscription for $14.99 - You save 74%!• 1-month subscription for $1.99Your subscription will automatically renew unless you cancel 24 hours before the subscription runs out. You can turn off auto-renewal at any time from your iTunes account settings. No cancellation of the current subscription is allowed during an active subscription period.For more information, read our privacy policy and terms of use. http://www.bonniercorp.com/privacy-policy/