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ScienceDaily: Fossils & Ruins News |
| Earth's cryosphere shrinking by 87,000 square kilometers per year Posted: 01 Jul 2021 04:52 PM PDT A new study reports the first global assessment of the extent of snow and ice cover on Earth's surface -- a critical factor cooling the planet through reflected sunlight -- and its response to warming temperatures. |
| Why are some fish warm-blooded? Predatory sharks gain speed advantage, study finds Posted: 01 Jul 2021 08:27 AM PDT New research from marine biologists offers answers to a fundamental puzzle that had until now remained unsolved: why are some fish warm-blooded when most are not? It turns out that while (warm-blooded) fish able to regulate their own body temperatures can swim faster, they do not live in waters spanning a broader range of temperatures. |
| Global climate dynamics drove the decline of mastodonts and elephants, new study suggests Posted: 01 Jul 2021 08:26 AM PDT Elephants and their forebears were pushed into wipeout by waves of extreme global environmental change, rather than overhunting by early humans, according to new research. |
| Eruption of the Laacher See volcano redated Posted: 01 Jul 2021 08:26 AM PDT The eruption of the Laacher See volcano in the Eifel in Germany is one of Central Europe's largest eruptions over the past 100,000 years. Technical advances in combination with tree remains buried in the course of the eruption now enabled an international research team to accurately date the event. Accordingly, the eruption of the Laacher See volcano occurred 13,077 years ago and thus 126 years earlier than previously assumed. |
| Where are the Foreigners of the First International Age? Posted: 30 Jun 2021 02:36 PM PDT A new study reports genetic and oxygen and strontium isotopic data for individuals buried at Alalakh, finding little evidence for the foreigners mentioned in texts. |
| Protein 'big bang' reveals molecular makeup for medicine and bioengineering Posted: 30 Jun 2021 01:37 PM PDT A new study maps the evolutionary history and interrelationships of protein domains, the subunits of protein molecules, over 3.8 billion years. |
| Digging into the molecules of fossilized dinosaur eggshells Posted: 30 Jun 2021 09:54 AM PDT Dinosaurs roamed the Earth more than 65 million years ago, and paleontologists and amateur fossil hunters are still unearthing traces of them today. The minerals in fossilized eggs and shell fragments provide snapshots into these creatures' early lives, as well as their fossilization processes. Now, researchers have analyzed the molecular makeup of fossilized dinosaur eggshells from Mexico, finding nine amino acids and evidence of ancient protein structures. |
| Fecal records show Maya population affected by climate change Posted: 30 Jun 2021 09:54 AM PDT A new study has shown that the size of the Maya population in the lowland city of Itzan (in present-day Guatemala) varied over time in response to climate change. The findings show that both droughts and very wet periods led to important population declines. |
| Prehistoric homes would have failed modern air quality tests Posted: 30 Jun 2021 08:54 AM PDT Domestic burning of wood and dung fuels in Neolithic homes would have exceeded modern internationally agreed standards for indoor air quality, exposing inhabitants to unsafe levels of particulates, research has shown. |
| New beetle species found pristinely preserved in fossilized dropping of dinosaur ancestor Posted: 30 Jun 2021 08:54 AM PDT Fossilized feces are common finds at paleontological dig sites and might actually contain hidden treasures. By scanning fossilized dung assigned to a close dinosaur relative from the Triassic period, scientists discovered a 230-million-year-old beetle species, representing a new family of beetles, previously unknown to science. The beetles were preserved in a 3D state with their legs and antennae fully intact. |
| Polymers in meteorites provide clues to early solar system Posted: 29 Jun 2021 09:08 AM PDT Meteorites that do not experience high temperatures at any point in their existence provide a good record of complex chemistry present when or before our solar system was formed. So researchers have examined individual amino acids in these meteorites, many of which are not in present-day organisms. Researchers now show the existence of a systematic group of amino acid polymers across several members of the oldest meteorite class, the CV3 type. |
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