Meta allowed pornographic ads that break its content moderation rules
Last year, Meta allowed thousands of paid ads containing sexually explicit imagery on social media platforms, including Facebook and Instagram
Has a volcanic eruption ever wiped out a species of hominins?
Volcanoes have been proposed as the reason for the extinction of the Neanderthals and the hobbits of Indonesia, but the end of those species may not have come from a single, dramatic event
Intricate ancient tattoos revealed by shining lasers on mummies
The tattoos of 1200-year-old mummies from Peru can now be seen in exquisite detail, showing fine markings that may have been made with cactus needles or animal bones
Mars may have a solid inner core like Earth does
A new analysis of marsquakes measured by NASA’s InSight lander indicates Mars has a solid inner core – but other researchers say the evidence is thin
A supermassive black hole is sending out a mysterious pulsing beat
Regular pulses of X-ray radiation emanating from a supermassive black hole could be explained by a white dwarf star on the verge of falling in
Melting ice reveals millennia-old forest buried in the Rocky mountains
Trees dating back almost 6000 years have come to scientists' attention due to ice melting in the Rocky mountains, offering a "time capsule" into the past
Laser technique measures vast distances with nanometre precision
A new technique involving lasers can measure long distances more precisely than ever, which could be useful for space telescopes
Comet that could shine as bright as Venus set to be visible from Earth
Comet C/2024 G3 (ATLAS) should be visible from the southern hemisphere, and possibly also the northern hemisphere, over the next few days
Tomato plants are covered in tiny anti-pest booby traps
A more detailed understanding of the natural anti-insect protections of tomato plants can lead to better pest-management strategies
Gene-edited cells that evade rejection show promise in type 1 diabetes
Insulin-producing cells injected into a man with type 1 diabetes have survived for a month so far without the need for immune suppression