Soy sauce element, yawning cause, sun's sibling are among top 5 scientific revelations of the week

Soy sauce just might be the next HIV inhibitor and that's just one of five revelations in science, discovery, innovation and tech news that hit the headlines this week. In case you missed a day of news here is a wrap-up of the most interesting developments from scientists and researchers.

1. Soy sauce may be the next big weapon in the HIV/AIDs battle as researchers at the University of Missouri confirmed that a flavor-enhancing molecule could stop the virus from replicating. It seem the molecule, EfdA, develops compounds that are 70 times more potent than Tenofovir, a first-line HIV drug treatment.
2. The sun isn't an only child as most astronomers have long thought. A report this week reveals that a star born of the same gas cloud as the sun about 4.5 billion years ago has been found. It's bigger and a little hotter but it has the same chemical fingerprint.
3. The next thing NASA may send into space, specifically to Mars, won't be an astronaut but a plant. Plans are now afoot in sending plant life to the Red Planet in early 202, a few years before the expected arrival of the first humans in 2024, signaling the advent of a yet another milestone in space exploration.
4. Those who have lost an arm may just be sporting the latest in robotics if a new "Darth Vader" type prosthetic comes to market. The DEKA Arm System can perform up to 10 complex tasks using electrical signals generated by muscles in the arm that are involved in arm and finger movements.
5. Yawning isn't about being tired or bored. Apparently it's about cooling the brain, say researchers. Yawns are the body's way of keeping temperature on an even keel and in "optimal homeostasis."