Top left: Plant leaves. Top right: cultured cells of the diatom Phaeodactylum tricornutum. Image A: Electron micrograph of a plant chloroplast revealing its internal structure of grana (shown in yellow), where PSII predominates, and lamellae (shown in green), where...
DNA arrays change shape in response to an external trigger.
Credit: Yonggang Ke
Biomedical engineers have built simple machines out of DNA, consisting of arrays whose units switch reversibly between two different shapes.
The arrays' inventors say they could be harnessed...
Numbers on red branches from the first eutherian ancestor to Homo sapiens are the numbers of breakpoints in reconstructed ancestral chromosome fragments. Breakpoints are locations where a chromosome broke open, allowing for rearrangements. The number of breakpoints per million...
Chinlestegophis jenkinsi was a tiny subterranean carnivore and is an ancient relative of frogs and salamanders.
Credit: Illustration by Jorge Gonzalez
Researchers have determined that the fossils of an extinct species from the Triassic Period are the long-missing link that connects...
Toe prosthesis of a female burial from the Theban tomb TT95, early first millennium BC. Egyptian Museum Cairo, JE100016a.
Credit: University of Basel, LHTT. Image: Matjaž Kacicnik
It is likely to be one of the oldest prosthetic devices in human history:...
Cats and humans have shared the same households for at least 9,000 years, but we still know very little about how our feline friends became domesticated.
Credit: © Alta Oosthuizen / Fotolia
Cats and humans have shared the same households for...
Dr. Lan Ko, cancer biologist in the Department of Pathology at MCG at Augusta University and Dr. Ali S. Arbab, a tumor angiogenesis expert at the Georgia Cancer Center and the MCG Department of Biochemistry and Molecular Biology, was...
Illustration shows the bone-tissue engineering technique developed by Cedars-Sinai investigators. "Endogenous MSCs" refers to stem cells from a patient's bone. The "BMP gene" is a gene that promotes bone repair.
Credit: Gazit Group/Cedars-Sinai
A Cedars-Sinai-led team of investigators has successfully repaired...
The diagram depicts the interplay between calcium and RGS2 during egg development and fertilization. RGS2 suppresses calcium signaling long enough for the sperm to travel and fuse with the egg.
Credit: NIEHS
Researchers at the National Institutes of Health have discovered...
The transition from an egg to a developing embryo is one of life’s most remarkable transformations. Whitehead Institute researchers have deciphered how one aspect—control of the all-important translation of messenger RNAs (mRNAs) into proteins—switches as the egg becomes an...
This is an artistic reconstruction and skeleton made by Voltaire Paes Neto.
Credit: Voltaire Paes Neto; CC-BY
Some Late Triassic Brazilian fossils of mammal-like reptiles, previously identified as Chiniquodon, may in fact be the first Aleodon specimens found outside Africa, according...
