NASA’s Parker Solar Probe could solve the mysteries of the solar wind and test Einstein’s theory of relativity.

Renewables supplied 71% of Portugal’s electricity in 2024, including 10% from solar, as production hit a record 36.7 TWh, according to grid operator Redes Energéticas Nacionais (REN).

Twins are pretty rare, accounting for just 3% of births in the U.S. these days. But new research shows that for primates 60 million years ago, giving birth to twins was the norm.