Earth's supply of water is incredibly important for its ability to sustain life, but where did that water come from? Was it present when Earth formed or was it delivered later by meteorites or comets from outer space?
Planetary Sciences
Feb 15, 2022
2
234
What makes a planet a planet? The answer turns out to be rather contentious. The official definition of a planet, as defined by the International Astronomical Union (IAU) is that a planet must satisfy three conditions:
Planetary Sciences
Nov 3, 2021
6
99
Sperm size varies dramatically among different animal species. But why is sperm size so variable when they share the same job—to fertilize eggs? In a new article published in Nature Ecology and Evolution, researchers from ...
Evolution
Jun 21, 2021
1
10
The fact that the human body is made up of cells is a basic, well-understood concept. Yet amazingly, scientists are still trying to determine the various types of cells that make up our organs and contribute to our health.
Biotechnology
Apr 19, 2021
0
155
Mammal defaunation—the loss of mammals to extinction, extirpation and population decline—in the Neotropics and its adverse effects is the focus for two scientific papers produced recently by a group of scientists led ...
Ecology
Nov 11, 2020
0
13
It is generally accepted that the inner region of the early solar system was subject to an intense period of meteoric bombardment referred to as the late heavy bombardment. However, researchers have found evidence that suggests ...
Space Exploration
Sep 16, 2020
26
304
The devastating effects of human activity on wildlife in the American tropics over the last 500 years are revealed in a new study published today.
Ecology
Sep 15, 2020
0
176
Strange things often wash up on North Carolina's Outer Banks, and the National Park Service says the latest example is a big, prehistoric-looking bird that is far outside its natural range.
Plants & Animals
Jul 15, 2020
0
5479
Showy peacock feathers, extravagant elk antlers and powerful crayfish claws are just a few examples of the ostentatious animal extremes used to compete for and attract mates, a process called sexual selection.
Plants & Animals
Mar 17, 2020
0
178
The relatively squat and gangly humpback whale moves more efficiently through the water than its sleeker, larger cousin, the blue whale, according to new research that used devices attached to the animals to collect information ...
Ecology
Feb 19, 2020
0
1244
