Plants know their kin
Some plants recognise and cooperate with close relatives, and compete with “strangers”, say Susan Dudley and Amanda File of McMaster University in Ontario, Canada. They report that the Great Lakes sea rocket (Cakile edentula) “competed” by putting out extra roots when grown in trays alongside “stranger” plants (Biology Letters, DOI: 10:1098/rsbl.2007.0232).
Ghost of Titan’s ocean
An enigmatic radio signal detected by the European Space Agency’s Huygens probe as it descended to Saturn’s moon Titan could turn out to come from an ice-covered ocean. Fernando Simoes of the Centre for the Study of Terrestrial and Planetary…
