Summary:
- The article discusses the development of next-generation gravitational wave observatories, such as the Laser Interferometer Space Antenna (LISA) and the Einstein Telescope, which will possess significantly higher sensitivity than current detectors like LIGO.
- These advanced instruments aim to detect "primordial" black holes—hypothetical objects formed in the immediate aftermath of the Big Bang—which could provide crucial data on the early universe's density fluctuations and potential dark matter candidates.