# Summary of ##hplusroadmap IRC Log (September 28, 2015)

• A discussion about water on Mars occurred, with links to a Nature article showing evidence of what might be seasonal briny water flows on the Martian surface, though one participant noted it was "underwhelming" as it's more like "shadows that might be the ground leaking some briney water."

• A technical conversation about gear manufacturing took place, comparing hobbing machines versus milling machines for creating precision gears, with the conclusion that while milling can be used, it doesn't provide the precision of dedicated gear-cutting equipment.

• A researcher mentioned their master's thesis work on surface energy to kinetic energy conversion for microdroplets, which involves "vaguely tricky geometric curves."

• A user shared a video demonstrating flying machines building a rope bridge, showcasing an innovative application of drone technology for construction.

• A discussion about conductive paper (Teledeltos) referenced its applications in solving biomedical engineering problems, with links to DIY physics and implantable device resources.

• A user reported successfully setting up a mini laser etcher on Ubuntu Linux after having driver issues with Windows 8, noting concerns about ventilation when using the device due to the smell produced even when etching paper.