A pile of ancient arrowheads from southern Africa still holds traces of toxic plant residue, even after some 60,000 years. The discovery pushes back the earliest direct evidence of poisoned arrow use ...
New research utilizing data from NASA's Parker Solar Probe has provided the first direct evidence of a phenomenon known as the "helicity barrier" in the solar wind. This discovery, published in ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results