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Washington, Jan 23 - A new study has revealed that the mammalian heart regenerative capacity depends on severity of injury.

Using cryoinjury, that is damaging the heart through exposure to extreme cold in order to mimic cellular injury caused by myocardial infarction, researchers at University of Southern California found that neonatal mouse hearts can fully recover normal function following a mild injury, though fail to regenerate after a severe injury.

Senior author Ellen Lien said that using models such as zebrafish and neonatal mice that regenerate their hearts naturally, they can begin to identify important molecules that enhance heart repair.

Washington, Jan. 23 - A new study has recently revealed that human ancestors used their hands just as modern humans 3 million years ago.

It has been suggested that pre-Homo human ancestral species, such as Australopithecus africanus, used human-like hand postures much earlier than was previously thought.

Mumbai - The rupee strengthened by 35 paise to 61.35 against the dollar in early trade today at the Interbank Foreign Exchange on strong selling of the US currency by exporters amid sustained capital inflows.

Forex dealers said besides selling of the American currency by exporters, continued overseas capital inflows and soaring domestic equity markets supported the rupee.

They said, however, euro sinking to its lowest level in more than a decade against the US dollar after the ECB announced stimulus programme capped the rupee's gains.

Mumbai - Extending their bull run for the seventh straight session, the BSE Sensex scaled another peak of 29,389.18 and the NSE Nifty breached the 8,800-mark for the first time in opening trade, driven by positive global cues triggered by European Central Bank's stimulus measures.

The benchmark BSE Sensex climbed 383.16 points, or 1.32 percent, to trade at a new high of 29,389.18, breaking its previous record of 29,060.41 (intra-day) touched in yesterday's trade.

The benchmark index had gained 1,659.20 points in the previous six sessions.

Washington, Jan. 23 - A new study has recently revealed that asteroid impact didn't cause vast global firestorms that wiped out the dinosaurs.

A team of researchers from the University of Exeter, University of Edinburgh and Imperial College London recreated the immense energy released from an extra-terrestrial collision with Earth that occurred around the time that dinosaurs became extinct.

They found that the intense but short-lived heat near the impact site could not have ignited live plants, challenging the idea that the impact led to global firestorms.

New Delhi - High 3G spectrum base price of Rs 3,705 crore recommended by inter-ministerial panel Telecom Commission and less quantum of airwaves being put for auction will adversely impact development Indian mobile networks, global telecom body GSM Association said Thursday.

"The GSMA is concerned by the action of the Telecom Commission to increase reserve prices for India's 2100MHz (3G) spectrum auction next month ? almost 36 per cent higher than those recommended by the Telecom Regulatory Authority of India (TRAI)," GSMA's Chief Regulatory Officer Tom Phillips said in statement.

Telecom regulator TRAI last month recommended base price of Rs 2,720 crore per Mhz for 3G.