Guatemala
Scientists fired lasers from planes to map nearly 1,000 ancient Mayan settlements beneath the rainforest canopy. The technology has revealed pyramids, reservoirs, and canals, revealing the incredible extent and interconnectedness of civilization around the millennia-old city of El Mirador.
India
Geologists have found 92 fossilized nests filled with 256 Titanosaurus eggs. This is one of the largest dinosaur hatcheries ever discovered. His six species of giant, long-necked herbivores spawned, showing more diversity than expected. Animals nested nearby, as do many modern birds.
Japan
In an unlikely partnership, Japan’s rare Amami rabbit makes a mutually beneficial arrangement with a parasitic plant that absorbs energy from the roots of others. I discovered that few other animals would devour it and disperse its seeds.
Siberia
The first humans arrived in the Americas from Northeast Asia, but Native American DNA found in ancient Siberian genomes suggests it wasn’t a one-way street. A Native American, it is likely that in recent times he crossed to Siberia by ship many times, including 1,500 years ago.
Singapore
Like dogs that breed with wolves, chickens may mate with their non-domesticated brethren. A new study suggests that chicken DNA has replaced the wild genome of the local red junglefowl. This jeopardizes the genetic diversity of the latter and potentially their ability to adapt to disease.
we
The Food and Drug Administration will no longer require new drugs to be tested on animals. Developers can use alternative methods, such as using his chip to simulate human tissue, to prove that drugs are safe to test on humans.
For more information, please visit www.ScientificAmerican.com/apr2023/advances.
