A PhD student spotted the wolves going after the so-called'king of the forest' on a trail camera. More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. Breakthroughs, discoveries, and DIY tips sent six days a week. By signing up, you confirm you are 16+, will receive newsletters and promotional content and agree to our Terms of Use and acknowledge the data practices in our Privacy Policy . While reviewing footage for her PhD research, Polish Academy of Sciences ecologist Robin Wijnands spotted something pretty wild .

'Adelphailurus kansensis' was about the size of a puma and lived in North America over five million years ago. More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. An artist's rendering of what the early saber-toothed cat, 'Adelphailurus kansensis,' might have looked like in its heyday 5 million years ago. About the size of today's mountain lions, the cats already had teeth optimized for slicing and shredding flesh, though the fangs were much smaller than those of later sabertooths, such as the iconic'Smilodon.' Breakthroughs, discoveries, and DIY tips sent six days a week.

Amazon's Prime Day shopping holiday is almost over, but there are still tons of fantastic deals to grab before prices go back up. More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. Don't miss out on savings. We may earn revenue from the products available on this page and participate in affiliate programs. By signing up, you confirm you are 16+, will receive newsletters and promotional content and agree to our Terms of Use and acknowledge the data practices in our Privacy Policy .

Pick up this deal on Jackery's most portable battery and power up your adventures wherever they take you. It's summer, time to head out into the great outdoors. If you want to get a bit off the beaten path, but still have power, grab this deal on the Jackery Explorer 300 Portable Power Station. This little power station has enough juice to keep the blender humming through a hot summer afternoon at the beach. The temptation with portable power stations is to go big.

The rare wildcat was recently born at the Nashville Zoo. More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. Breakthroughs, discoveries, and DIY tips sent six days a week. By signing up, you confirm you are 16+, will receive newsletters and promotional content and agree to our Terms of Use and acknowledge the data practices in our Privacy Policy . The Nashville Zoo in Tennessee is celebrating the birth of a new baby clouded leopard ().

These luminous beetles use light to flirt and fend off predators. More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. Breakthroughs, discoveries, and DIY tips sent six days a week. By signing up, you confirm you are 16+, will receive newsletters and promotional content and agree to our Terms of Use and acknowledge the data practices in our Privacy Policy . Growing up, Clyde Sorenson loved catching bugs, especially fireflies.

Training-free source selection for LLM families with shared vocabularies arises in scientific string domains such as SMILES, protein, and genomic sequences, where candidate corpora share a tokenizer but differ in prediction targets. This creates an activation-dark regime: representation-similarity metrics can be uninformative without assumptions about label-conditioned error geometry, while classical update-geometry metrics are computationally prohibitive at vocabulary scale. We show that, in a shared-output head setting, representation metrics (e.g., CKA) are non-identifiable for transfer; models can share identical representations yet have orthogonal head updates. The key identity is that head Fisher alignment is exactly a cosine between kernel mean embeddings in the joint activation-error space, exposing activation, error, and coupling factors rather than requiring a materialized Fisher matrix. FisherSketch estimates this cosine directly in a single streaming pass, making K=128,256 head Fisher alignment practical with a 16 KB task signature (m=4096) and a 192 KB per-task streaming state, small enough to store next to a model hash, but encoding transfer-relevant update structure. Beyond source selection, the same signatures and marginals provide a diagnostic instrument for studying whether LLM task similarity is driven by activations, errors, or their coupling; shared-parameter and internal-layer validations, together with Llama-3.1-8B verbalizer-shift experiments, show that FisherSketch remains informative when activation similarity cannot distinguish tasks.

Uncertainty estimates in machine learning are typically evaluated using generic metrics such as the negative log-likelihood and expected calibration error, yet good performance on such metrics does not necessarily imply high utility in downstream decisions. We introduce decision-alignment, a criterion that reveals which evaluation metrics meaningfully align with downstream utilities. Applying this framework, we show that many widely used uncertainty metrics are either misaligned with common decision problems or encode pathological prior beliefs about the downstream task. We then propose prior-weighted utility metrics, a special class of proper scoring rules that provides decision-aligned uncertainty evaluation. Across benchmark experiments and real-world case studies, our metrics consistently align with realized decision utility, while conventional metrics do not. Our results surface flaws in the current UQ evaluation protocol and offer a principled extension of existing metrics toward decision-relevant UQ evaluation.

Environment Energy Renewables 300-year-old shipwreck found near world's largest offshore wind farm The three rare ingots discovered under 131-feet of water hearken back to England's former lead industry. More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. The ingots featured lettered imprints similar to other artifacts dating to the 17th century. Breakthroughs, discoveries, and DIY tips sent six days a week. By signing up, you confirm you are 16+, will receive newsletters and promotional content and agree to our Terms of Use and acknowledge the data practices in our Privacy Policy .

French start-up VELA claims its massive sailboat can move 415 metric tons across the Atlantic, using only the wind. More information Adding us as a Preferred Source in Google by using this link indicates that you would like to see more of our content in Google News results. The three-hulled design increases stability and helps it cut through open ocean swells. Breakthroughs, discoveries, and DIY tips sent six days a week. By signing up, you confirm you are 16+, will receive newsletters and promotional content and agree to our Terms of Use and acknowledge the data practices in our Privacy Policy .