Not sure but it is old news about the development of reusable rockets instead of expandable once.

Actually Android follows the Philosophy of Palm Treo, open source OS with free customization and without voiding the warranty. Seems like since the past 5 years this is less and less apparent. What Google says is different from what we use. None of the Android OS is Customizable, cant move apps from device storage to External storage. Cant free up space easily with low storage devices. All one thing is that Users are forced to Use what Google is offering.

You should have a 0.25 cubic meters of a bathtub. Just go and have it, it will easily pour approximately 250 to 230 liters of liquid which is nearly 74 gallons. L*B*H = 1*0.5*0.5 m3

Examples given here are just for comparison and show its size nothing related to engineering and all, as it is built from titanium using 3D technology.

Wind Turbines metal, especially the turbine blade are composite metals which can not be recycled. No one cares before installing and earlier phases of development that how this metals can be recycled or reused. R&D must be done on these factors too.