Swimming

American scientists have created a "Tunabot," that they claim can match the swimming speed of an actual tuna.

​Competitive swimmers certainly like to track their performance, often using devices such as swim watches – the problem is, the athletes have to stop to look at those things. A Vancouver-based startup is out to address that problem, with its head-up display (HUD) Form Swim Goggles.

Scientists from Taiwan are suggesting not all exercise is equal when it comes to those with a genetic propensity for obesity trying to lose weight. The study concluded jogging was better for weight loss than either swimming or cycling in those subjects with a genetic predisposition for obesity.

​Let's face it: due to the amount of thrust required to lift a person off the ground, practical personal jetpacks may never exist – at least, not for use in the air. Underwater jetpacks, however, are another story. We've seen a few lately, with one of the latest incorporating a novel backpack unit.

​When you see hardcore lake or ocean swimmers who are far from shore, you've gotta wonder – what happens if they get tired, or get a cramp? Well, there are flotation devices that they can use, although some of them are cumbersome. The Tekrapod, however, is designed not to be.

A small study has found that a short swim in the ocean can alter the composition of a person’s skin microbiome for at least 24 hours. It is unclear what the implications of these changes are but the researchers hypothesize the alterations could leave a person more susceptible to infection.

​We've seen mermaid-type monofins before, and we've also seen so-called underwater scooters. A group of US/UK entrepreneurs has gone and combined the two, in the form of a monofin that gives swimmers an electric boost with each kick.

​There are already swim-tracking wearables such as watches, that track data such as the number of lengths swum. TritonWear is taking things further, however, with its just-announced Triton 2 – the device tracks 13 swimming metrics at once, transmitting data in real time for performance analysis.

Casa B, by Italian firm Architrend Architecture, is a recently-completed concrete townhouse that's fronted by a glazed facade. In a novel touch that brings to mind Casa Brutale, the home also has a glass-bottomed swimming pool up top.

​Since at least 2004, surfers, swimmers and scuba divers have been able to buy an electronic shark-deterrent device known as the Shark Shield. Its patented technology is now being offered in a handheld speargun-like gadget, called the eSpear.

​A couple of years ago, Chinese startup Sublue Tech successfully crowdfunded its WhiteShark MIX underwater scooter. Now, the company is back with the faster and longer-running Seabow.

Every now and then, an invention comes along that makes us wonder how we ever lived without it – but those are in the minority. New Atlas rounds up the weirdest and wackiest inventions that left us scratching our heads this year.