A research team led by Prof. Kinnert Keren and Prof. Erez Braun presented a new explanation for the rare regenerative ability of the Hydra
A study published February 7 in Cell Reports suggests that pieces of hydras have structural memory that helps them shape their new body plan according to the pattern inherited by the animal’s “skeleton.” Previously, scientists thought that only chemical signals told a hydra where its heads and/or feet should form.
see the paper in Cell Report
see more about it in The New York Times - How a Little Bit of Hydra Regrows a Whole Animal by James Gorman, The Scientist Magazine - Cytoskeletons Direct Hydra Regeneration by
The Moon, and the question of how it was formed, has long been a source of fascination and wonder. Now, a team of Israeli researchers suggests that the Moon we see every night is not Earth’s first moon, but rather the last in a series of moons that orbited the Earth in the past. The findings by the team of researchers from the Technion-Israel Institute of Technology and the Weizmann Institute of Science are published today in Nature Geoscience.
The newly proposed theory by researchers Assistant Prof. Hagai Perets, of the Technion, and Weizmann Institute Raluca Rufu (lead author) and Prof. Oded Aharonson, runs counter to the commonly held “giant impact” paradigm that the moon is a single object that was formed following a single giant collision between a small Mars-like planet and the ancient Earth.
see more about this at the New Yorker - the meny-moons theory by Alan Burdick, Science Daily - How Earth's previous moons collided to form the moon: New theory
in Hebrew: Ynet