Even though Elon Musk's SpaceX is busy formulating plans to take humans to Mars, critics believe that these missions could never get materialized due to various reasons
Under the Forest Restoration Action Plan, Singapore wants to plant an additional 250,000 native trees and shrubs, besides acquiring islands off its coast for mangrove coverage
Scientists have grown crops in Martian and Moon's soil simulants that were bolstered by NASA. They seem to indicate that food can be grown on Martian and lunar soil in order to feed settlers on those planets and also to obtain some seeds from them.
A NASA space engineer has come up with the original idea of a 'helical engine' as a solution to the next-generation space accelerator, which can propel spacecraft "close to light speed".