For mammals, the amount of indirect energy–the previously unquantified metabolic cost to synthesize and carry offspring–composes about 90% of the total energy used in the reproduction process from fertilization to birth. DepositPhotos We all know that having kids is expensive, but that truth is more universal than you might think....

A southern sea otter uses a rock anvil to break open shells of prey. Monterey Bay Aquarium Hungry sea otters have figured out a workaround when they want to open up a crustacean’s shell without hurting their teeth: by using tools. The furry marine mammals are vital to California’s kelp forests and can eat 25 percent of their own...

Artist concept of novel approach proposed by a 2024 NIAC Phase II awardee for possible future missions depicting lunar surface with planet Earth on the horizon. Credit: Ethan Schaler A NASA mechanical engineer wants to build a levitating magnetic robot train on the moon—and his employer is interested in hearing more. Earlier...

The Red Pyramid at the Dahshur necropolis, constructed during the Fourth Dynasty. Credit: Eman Ghoneim A long lost portion of the Nile may answer a mystery behind some of ancient Egypt’s most famous pyramids. According to researchers, 31 structures—including the pyramids of Giza—at one time stood near the banks of a now dry river...

Use tab groups to make browsing easier. Google Somewhere in the dim and distant past, we all switched from looking at one webpage at a time, to having dozens of tabs open simultaneously—and our attention spans have never been the same since. Managing all of these open tabs can be a problem, for some more so than others, but Google...

Stack CommerceWe may earn revenue from the products available on this page and participate in affiliate programs. Learn more › Are you planning a road trip soon? This Apple CarPlay and Android Auto-compatible wireless adapter revolutionizes how we integrate our smartphones with our vehicles’ infotainment systems, making every...