There is no substitute for helium when it comes to pushing rocket fuel from the tanks into the engines. It is estimated that helium worth USD 1 million is consumed per launch.
Central to physics are ideas such as energy, mass, particles and waves. Physics attempts to both answer philosophical questions about the nature of the universe and provide solutions to ...
After decades of study, scientists sound genuinely optimistic about the possibility of detecting primordial black holes, which might explain dark matter.