51动漫

51动漫

Explore the most exciting new ideas and emerging concepts in science, health, technology and the environment with 51动漫鈥檚 exclusive in-depth articles, interviews and long reads.

Artistic reconstruction of the reptile adaptive radiation in a terrestrial ecosystem during the warmest period in Earth?s history. Image depicts a massive, big-headed, carnivorous erythrosuchid (close relative to crocodiles and dinosaurs) and a tiny gliding reptile at about 240 million years ago. The erythrosuchid is chasing the gliding reptile and it is propelling itself using a fossilized skull of the extinct Dimetrodon (early mammalian ancestor) in a hot and dry river valley. Image created by Henry Sharpe.

Life

Reptile boom 250 million years ago may have been due to global warming

A spike in global temperatures could have been the trigger for the rise of reptiles towards the end of the Permian Period, not a mass extinction of mammals as had been thought

News
Saccharin or sweetener crystals and stevia branch green leaves on an old wood background.; Shutterstock ID 1962882754; purchase_order: -; job: -; client: -; other: -

Health

Some artificial sweeteners can raise your blood sugar

News
Original Caption Released with Image: The puzzling, fascinating surface of Jupiter's icy moon Europa looms large in this newly-reprocessed color view, made from images taken by NASA's Galileo spacecraft in the late 1990s. This is the color view of Europa from Galileo that shows the largest portion of the moon's surface at the highest resolution. The view was previously released as a mosaic with lower resolution and strongly enhanced color (see PIA02590). To create this new version, the images were assembled into a realistic color view of the surface that approximates how Europa would appear to the human eye. The scene shows the stunning diversity of Europa's surface geology. Long, linear cracks and ridges crisscross the surface, interrupted by regions of disrupted terrain where the surface ice crust has been broken up and re-frozen into new patterns. Color variations across the surface are associated with differences in geologic feature type and location. For example, areas that appear blue or white contain relatively pure water ice, while reddish and brownish areas include non-ice components in higher concentrations. The polar regions, visible at the left and right of this view, are noticeably bluer than the more equatorial latitudes, which look more white. This color variation is thought to be due to differences in ice grain size in the two locations. Images taken through near-infrared, green and violet filters have been combined to produce this view. The images have been corrected for light scattered outside of the image, to provide a color correction that is calibrated by wavelength. Gaps in the images have been filled with simulated color based on the color of nearby surface areas with similar terrain types. This global color view consists of images acquired by the Galileo Solid-State Imaging (SSI) experiment on the spacecraft's first and fourteenth orbits through the Jupiter system, in 1995 and 1998, respectively. Image scale is 1 mile (1.6 kilometers) per pixel. North on Europa is at right. The Galileo mission was managed by NASA's Jet Propulsion Laboratory in Pasadena, California, for the agency's Science Mission Directorate in Washington. JPL is a division of the California Institute of Technology, Pasadena. Additional information about Galileo and its discoveries is available on the Galileo mission home page at http://solarsystem.nasa.gov/galileo/. More information about Europa is available at http://solarsystem.nasa.gov/europa. Image Credit: NASA/JPL-Caltech/SETI Institute

Space

Shards of pure ice might snow upwards beneath the ice shell of Europa

News
Lateral flow test

Health

Most people with covid-19 are still infectious after five days

News
A wide angle view shows piping laid along ten vegetable crop rows to irrigate with slow drips. Small green plants have sprouted along the rows.

Environment

Half of newly irrigated land is in water-stressed areas

News
Clean glass petri dish with liquid drop inside over blue light background

Chemistry

Water droplets can sometimes turn into bleach when hitting a surface

News
Rows of soybean plants

Environment

Genetic tweaks to upgrade photosynthesis boost soy yield by a fifth

News
Google Sycamore

Technology

Google’s quantum supremacy challenged by ordinary computers, for now

News
Mandatory Credit: Photo by Jurgen Christine Sohns/Imagebroker/Shutterstock (4401886a) European Polecat (Mustela putorius), adult, alert, Surrey, England, United Kingdom VARIOUS

Life

UK polecats numbers are rising as they interbreed with ferrets

News
Mosquito close up

Life

Mosquitoes have more ways to smell us than we thought

Female mosquitoes that had their human-scent receptors blocked could still smell people. The finding suggests the insects have a more elaborate olfactory system than was previously known

News

Life

Colombian dinosaur finally identified thanks to 2016 peace agreement

News

Health

Covid-19 linked to higher risk of brain conditions up to two years on

News

Technology

More than one in eight Reddit users publish toxic posts

News

Space

The star Betelgeuse has stopped dimming 鈥� but it’s still acting weird

News