America's leading infectious diseases expert has said is it now "quite evident" that an anti-malarial drug touted by Donald Trump has no impact on coronavirus.
For the first time since the space shuttle was retired in 2011, NASA is set to again launch its own astronauts into space from US soil.
Scientists have proposed introducing a new "orbit tax" to tackle the growing problem of debris or "space junk" encircling the Earth.
The World Health Organisation is removing hydroxychloroquine from its global study of potential COVID-19 treatments while it carries out a review of its safety.
Cancer experts are warning the NHS is "rationing" an innovative cancer treatment which could help deal with an expected surge in cases and "save lives".
The deep ocean is warming more slowly than the surface, but a new study shows that by the end of the century it could change catastrophically.