When and how humans first settled in the Americas is a subject of considerable controversy. In the 20th century, archaeologists believed that humans reached the North American interior no earlier than around 14,000 years ...
Archaeology
Oct 8, 2023
1
229
The smallest flowering plant on Earth might become a nutritious foodstuff for astronauts in the future, as well as a highly efficient source of oxygen. To help test their suitability for space, floating clumps of watermeal—individually ...
Space Exploration
Oct 6, 2023
1
49
New research confirms that fossil human footprints in New Mexico are likely the oldest direct evidence of human presence in the Americas, a finding that upends what many archaeologists thought they knew about when our ancestors ...
Archaeology
Oct 5, 2023
0
215
By studying fossils from ancient aquatic plants, Northwestern University and University of Wyoming (UW) researchers are gaining a better understanding of how methane produced in Arctic lakes might affect—and be affected ...
Earth Sciences
Sep 29, 2023
5
51
Aquatic creatures may help purify our wastewater. A team of researchers has investigated how invertebrates, such as worms, non-biting midge larvae and mussels that live on the bottom of streams and ditches, may benefit wastewater ...
Plants & Animals
Sep 28, 2023
0
1
An experiment using water from a large wastewater treatment plant (WWTP) carried out by the Stream Ecology group has shown that this water continues to affect river diversity and the trophic web (food web) despite being properly ...
Ecology
Sep 25, 2023
0
1
Though human-made ponds both sequester and release greenhouse gases, when added up, they may be net emitters, according to two related studies by Cornell researchers.
Earth Sciences
Sep 19, 2023
0
88
Frogs are in trouble. While many of the world's animal species are now at risk from habitat loss, climate change and other human pressures, frogs are particularly at risk.
Plants & Animals
Sep 14, 2023
0
8
A new study led by Texas A&M AgriLife Research has identified what may be a novel biological approach for removing extremely small and potentially dangerous plastic particles from water.
Cell & Microbiology
Sep 13, 2023
0
79
Cadmium (Cd), a heavy metal widely distributed in aquatic systems, enters water bodies through the use of phosphorus fertilizers and industrial discharges. Its high mobility in plant systems poses a great threat to human ...
Plants & Animals
Sep 7, 2023
0
1
