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White dwarf stars are thought to follow very specific “rules” – if they’re over a certain mass limit, they’ll explode in a supernova with a very predictable brightness and time. But now Caltech astronomers have found a strange twist: white dwarfs used to explode at lower masses than they do today.

People come in all shapes and sizes, so getting a bicycle that fits your needs is not always an easy task. New Zealand's Velogicfit designed the Right Bike system to help, using a combination of hardware and software to identify which bike is the right size and design for a customer's needs.

Kohn Pedersen Fox produces some of the best-looking skyscrapers around – as well as many of the tallest. Its most recent project is a 175-m (574 ft)-tall tower in Singapore with an eye-catching design and a significant amount of greenery, including a publicly accessible garden.

New Zealand's Ports of Auckland has agreed to buy the world's first full-size electric port tug from the Damen Shipyards Group. The RSD-E Tug 2513 is expected to match the pulling power of the Ports of Auckland's best diesel tug, but will do so without belching diesel fumes into the air.

A new Chinese startup has made its debut, with a high-performance luxury SUV it's designing to operate as part of a much broader smart city transport system. Human Horizons' HiPhi 1 will use more than 500 sensors and AI capabilities to communicate with vehicles, infrastructure and the internet.

Elon Musk revealed over the weekend that a new arm of the tunneling venture, The Boring Company, is in the works for China, a place where his electric car company also happens to be making some inroads. ​​

​Considering how important an organ it is, it’s a shame that the heart is so bad at repairing itself. Stem cells are an emerging solution, and now researchers at the Universities of Cambridge and Washington have combined heart muscle cells and supportive cells to help mend broken hearts.

Our bodies aren't great at regeneration. Other creatures have mastered this skill though, and now scientists at the University of California Davis (UC Davis) and Harvard have sequenced the RNA transcripts for the immortal hydra and figured out how it manages to do just that.

​Multitools are often about merging versatility and portability, and the newly announced M250 from Tactica is a particularly functional and classy attempt at striking this balance. It's built for everyday carry but can still accommodate a dozen hex bits.

When Citroën revealed the Jumper Biker Solution last year, the motorcycle-hauling camper van yelled "concept van," but Citroën immediately announced plans to sell it. Now it's expanding the Biker Solution line with an even roomier, more versatile hauling/camper van built to accommodate an ATV.

Japanese electronics giant NEC has been working with a company called Cartivator to design, build and test VTOL air taxi concepts. Now the two companies have demonstrated a multi-seat manned multicopter, a step toward a flying car future Japan believes will arrive around 2030.

​Hyundai is launching its first car with a solar rooftop as part of the vehicle's charging system. The solar panels in the new Sonata Hybrid's roof are expected to provide up to 60 percent of the car's battery charging per day and provide over 1,000 km of EV range per year.